2023 VCAA VCE General Maths Paper 2 Suggest Solutions | MaffsGuru.com

[@zayspace]

Absolute legend, appreciate it all for carrying us all for general math

[@MaffsGuru]

NO! Thank you for your support this year. I wouldn't be anything without you. Wishing you the very best for the rest of the exam season and whatever comes next.

[@zayspace]

@@MaffsGuru I'm sure we all owe it to you, Im currently in 11th grade, I've just finished all my Year 12 exams and im now gonna prepare for methods next year which is gonna involve a lot of rules and calculations cause of calculus 😬, but for the people at my school doing 3&4 general maths next year, i'll definitely refer them to you and to help grow your channel

[@lukeelliott2018]

Only found your channel about a couple days before the multi choice exam, but I genuinely think in that time you've gotten me atleast another 10 marks I wouldn't have otherwise. I only wish I found this page sooner. Cheers for all the help bossman

[@MaffsGuru]

You are more than welcome. Glad that it was useful. Can you spread the word about my channel so current students and those next year will be able to find it much sooner 😀

[@champman1957]

Thanks for the content maffs guru, I think I got around 90% on this exam which I’m happy with considering it was harder than the multi choice and I only got 80 on that. This is probably the end of the road for me watching your great maths videos but of course I will stay subbed 😉 and let more people know about your channel. The year 12 teachers at my school all recommend your content and for good reason, you helped me and my friends so much. Keep doing what you do, and don’t have any heart attacks when you blow up.

[@MaffsGuru]

What a lovely comment! Thanks so very much for letting me know. Wishing you the very best for the rest of the exam season and for whatever comes next! I couldn't do what I am doing without the support of people like you :) You make this all worthwhile!

[@Siuuuuuudays]

Thank you for what you did this whole year

[@MaffsGuru]

You are more than welcome! Thanks so much for your support! I wouldn't be anything without the people who like, subscribe and follow my channel! Wishing you the very best for the rest of the exam season and whatever comes next.

[@RexZ412]

thankyou for everything maffs guru!, your videos have been an absolute pleasure to watch throughout year 12. Im sure me, and everyone else can agree, so thankyou for carrying us to the end of year 12 brother

[@MaffsGuru]

You are more than welcome! Thanks so much for your comment and your support. I would be nothing without it. And if you can just spread the word once more to get as many people to subscribe as you can ... this would mean the absolute world to me! And get your teachers to use the resource too lol. Wishing you the very best for the rest of the exam season and whatever comes next.

[@joeloakley7609]

13C There is an algorithm and it makes it a lot easier. You simply note all the odd vertices. Then, if she is to travel all roads it is Eulerian and if she starts and ends at different vertices then it means you need 2 odd vertices. So as there are 6 odd vertices, you need to link 2 pairs and make them even. start at G, which isolates H as an odd vertex. So it must be L and N, M and J that you need to travel twice. Hence make them even vertices when you travel them twice.

[@MaffsGuru]

Thanks! I think this was mentioned a few times in other comments and I will update the video at some point. But really appreciate the time you have taken to make this comment.

[@Michael-ls9ms]

Thank you so much, Maffs Guru. I don't usually leave comments, but I felt obligated to. I only found out about your channel two weeks before the multiple choice component (Paper-A), yet I can confidently claim that, you've increased my marks by at least 10% since then. l'll be sure to recommend you to the upcoming year twelves, thank you once again!! :)

[@MaffsGuru]

Thank you so very much for the comment and spreading the word. I really appreciate it! And it's great to read that you feel your marks went up :) I'm sure you did all the hard work, but it was nice to think that I might have been on the sidelines cheering you on. Wishing you the very best of luck for the rest of the exam period and may success follow you through life!

[@nigletthepiglet7777]

Hey Darren, just finished my year 12 further course. I’d like to thank you for carrying me through this exam period and teaching me most of what I applied on my exam. Our journey together might be over but I’ll for sure recommend you too my friends and family. All the best

[@MaffsGuru]

Thank you so very much! I really appreciate it. Your support was gratefully appreciated. Thanks so much for saying your recommend my content. That's the highest compliment you could pay! If only more people would do it lol. And more schools use it!! Wishing you the very best for the rest of the exam season!!!

[@RachaelBanfield]

You’re a true legend, carried me thru maths this year

[@MaffsGuru]

I had little do to with it! You did all the hard work ... I was on the sidelines cheering you on. Now you've done ... be gone! And go and do something amazing with your life. Wishing you the very best for the rest of the exam season and whatever comes next.

[@jeffo1017]

thanks, besides a few questions i found it much easier than exam 1. unfortunately won’t need your channel anymore, but thanks for all your videos and help with further

[@MaffsGuru]

Really!? WOW! I thought this was much harder than exam 1!!! Don't worry about my channel. All good. Just let anyone know it's here should they need it. I'll keep plugging along.

[@sadiqquadr7964]

Question 11, why does the 9 need to be removed from leavers? The question did not specify the leavers having to be removed so would 9 0 not be the intended answer?

[@jerrodbatallones5073]

exactly what i was thinking, especially because the question also says leavers will stay leavers- therefore the number of leavers will only increase

[@zacgoldman8874]

By this logic both should be accepted

[@oliverwebster4538]

Yeah i think vcaa will have to accept both 9,0 and 9,-9. Both are correct according to the wording

[@sadiqquadr7964]

@@zacgoldman8874 What would the -9 symbolise? they werent mentioned at all. By your logic, I could do +9393993 instead of -9 or 0 since it wouldn't matter.

[@shutcapybara1142]

@@sadiqquadr7964 while iget your point anything with + would be wrong becasue your adding to leaver when they never joined but any negtive value between 0 and -9 should be excepted becasue less then that you have negative people

[@alibzy1406]

You are literally STUNNING

[@MaffsGuru]

I don't think anyone has ever said that about me! I think you might need your eyes testing! But thanks for the comment and for making me smile :) Wishing you the very best for the rest of the exam season and whatever comes next.

[@OwlHasLigma]

Thanks for sharing, sadly misinterpreted the "feature of this plot that is consistent with this time series having a seasonal component" because I said Irregular fluctuations 😢. Thought it meant what else is consistent with it being seasonality. Really bummed about that, but gonna focus on other exams now.

[@MaffsGuru]

It was an interesting question ... and I had to think twice about it. Don't worry about it now. There is nothing that can be done :) Wishing you the very best for the rest of the exam season and whatever comes next. Thanks so much for your support!

[@BossClockFFXIV]

Don't worry mate, looks like a significant amount of people also interpreted it that way. Let's wait and see.

[@patricklazzar9008]

Maffs Guru you made the news!! Thank you everything you've taught me over the years even back to Year 7!! You have been a life saver this year thanks to your videos. I cannot Thank you enough. fav quote: ''I shook COCO" 🤣🤣🤣

[@MaffsGuru]

PATRICK!!! I miss you!!! And I very much remember teaching you!!! Thanks so much for leaving a comment. I really appreciate it. I have become famous lol. But I will remain infamous as well :) Wishing you the very best of luck in any remaining exams and whatever you have planned for the holidays and next year! Well done for almost finishing Year 12!!!

[@patricklazzar9008]

@@MaffsGuru Thank you very much. So grateful to have you as a teacher! So glad everyone is watching your account, I am keen to see it continue to grow.🤩🤩🤩

[@MaffsGuru]

@@patricklazzar9008 you were there from the very beginning. I am also hoping the brand keeps growing!!!

[@joeloakley7609]

For question 3a how strict are they with accuracy? You got 0.1164 and rounded to 0.12. It says at the start of the paper not to round unless instructed.....should you actually plot closer to 0.1164 (ie. just below the 0.12 line)?

[@MaffsGuru]

You ask an interesting question! Looking at the question again, I would probably draw is slightly above the 0.115 line rather than at the 0.12. To be honest through, VCAA will give a range of accuracy accepted and I'm pretty sure they would have permitted anything between 0.115 and 0.12.

[@sebseb167]

Not sure if this has been said, but for question 13c, you can find all the odd vertices. Repeating the edges makes those vertices even.

[@MaffsGuru]

I am going to have to look at this ... as it seems there HAS to be a better way than trial and error. Thanks for your suggestion though.

[@marcellinobaselyous2825]

6 vertices have odd degree (G,H,N,L,M,J). Since it starts at G and ends somewhere else we can assume it can end at H. By laws of Eulerian trails, we can say that 2 extra edges are required between N,L and M,J so they are the two edges that will be passed over twice.

[@sebseb167]

@@marcellinobaselyous2825 Thanks for the nice explanation.

[@lilydarcy708]

thank you so much for carrying my exam revision :) i also really appreciate you posting this video so fast !!!

[@MaffsGuru]

You are more than welcome! Thanks so much for taking the time in making a comment and supporting me. I really wouldn't be here without you. If you could do me the honour of spreading the word about my channel and website I would be deeply grateful. I want to help as many students as I can ... but I need teachers and schools to know how great the resource is. Anyways ... sales pitch over! Wishing you the very best for the rest of your exams and for whatever comes next!

[@Hedgehg]

It was so reassuring to go through this today and get some explanations for the questions I was lost on. Thank you for helping me clarify my understanding, I feel so much better now :)

[@MaffsGuru]

Thank you for taking the time in making this comment. I really appreciate it. Don't worry about the marks you lost. You don't know how everyone else did across the state. I'm reading about so people who left 3 pages blank as they ran out of time :(

[@Hedgehg]

@@MaffsGuru It was a hard one for sure, thank you :)

[@cameroncarter9779]

How are you able to get your hands on the exam papers? do you have an inside man who smuggles a copy to you? just wondering. And on behalf of all of your subscribers. THANK YOU FOR YOUR KIND AND CONSTANT HELP, ENABLING US TO GET THROUGH YEAR 12. I, myself have 2 more exams, one tomorrow and my last exam is next Wednesday. Thank you again and have a great day.

[@MaffsGuru]

I work in a school lol. And we are allowed to have a copy of the paper 30 minutes after reading time is complete. So, I get the paper. Drive home. Sit in a very hot recording studio and put myself on camera hoping that I don't make any mistakes! I'm surprised my blood pressure isn't higher lol. It's the very definition of stress!!! And thank you for your support. I really appreciate it! Wishing you the very best of luck for the rest of your exams and may success follow you through life :)

[@Gdods1]

Hey mate keep up the great work you’ve been doing for us general maths students 🙏 please continue to make this kind of content

[@MaffsGuru]

Thanks so much for taking the time in making this comment. I really does mean the world to me when people let me know that they have watched the content and found it helpful. If only more people knew about the channel and website. Maybe one day lol. Please reach out if there is anything more I can do to help!

[@wonder8298]

for the second question in Q13, were you able to repeat edges? I always come across these types of questions never knowing whether I can repeat the edges or not. I don't think I did too well on this exam, but thank you so much for your videos all these years! they've helped me so much :)

[@MaffsGuru]

I think you could repeat edges but this wouldn’t have given you the shorted part. Sorry it’s taken so long to reply. You are more than welcome! I do this to be as much help as I can. Wishing you the very best of luck for the rest of the exams and results day. I’m sure you did better than you think!

[@lizcalder2973]

for question 13, i made the diagram an eulerian circuit by adding edges to the odd vertices J and M and L and N since you know it can't be G (obviously the multiple edges is equal to the path being travelled along twice)

[@MaffsGuru]

Thank you :) I'm going to go back and look at this again and see if I can make sense of it whilst I'm not trying to record the solutions under time pressure lol.

[@joeloakley7609]

I agree. Look at the odd vertices and then select the pairs with the smallest value connections. There are 6 odd degree vertices, so if you join 2 pairs to make them even degrees, it leaves 2 odd and the rest even. Eulerian circuit.

[@liam3284]

Question 10, reminds me so much of a programming problem early in my career. It was about state transitions. The answer was to build that kind of matrix.

[@MaffsGuru]

So long as it doesn't give you some form of PTSD!!!!

[@wendylieu1980]

Thank you sooo much!

[@MaffsGuru]

You are more than welcome! Wishing you the very best for the rest of the exam season and whatever comes next.

[@kristianphan4985]

so kind!!

[@bonquiquigames8986]

Mate u’ve helped me with math and all my worries

[@MaffsGuru]

Then my job is done! Well done on all you have achieved! Wishing you the very best of luck for the rest of your exams. And may the rest of your life be filled with success too. Please remember my channel should anyone you know need help with their Maths.

[@abberant3112]

thanks mate have a good night !

[@MaffsGuru]

I was exhausted by the end of the night :) But thank you!

[@llama10111]

Thank you so much it really means so much! Will recommend your channel to all my friends in younger year level. Thanks again and hope you're doing amazing

[@MaffsGuru]

The greatest thanks I could get is you recommending my channel and website to as many people as you can. Thanks so much for your support! Wishing you the very best for the rest of the exam season and whatever comes next.

[@joeloakley7609]

9c Do you need the I at the end as the question states in what order would they visit the 5 towns? So you'd only need to mention the 5 towns, not a return back to the first?

[@MaffsGuru]

They didn’t penalise for the additional I. But I would probably not put it in if I answered the paper again

[@dotubebros861]

Hey about question 11 how sure are you that writing -9 is crucial because it doesn’t say In the question if Sn should have the total number of workers represented in value S21. Like what is the reasoning for getting rid of that info might as well write a matrix B that creates an Sn+1 that includes the total left because the question doesn’t say what it wants the bottom value to represent

[@MaffsGuru]

Hi :) I am not sure it's crucial but I can't see how they will be able to deduct marks for it. In reading the question again, I can see how they might interpret it to mean the number of workers made 180 but I didn't read it this way. And, even if you do, the bottom value can certain be -9. Fingers crossed VCAA pay out the mark for both answers.

[@sadiqquadr7964]

Question 13b, it asks for the route not the minimum distance.

[@MaffsGuru]

Fair point! Sigh. I'll add an errata now. Thanks for picking up on this.

[@JulieJones-p8u]

For question 3C asking for strength, direction and form if you take out (5, 0.183) the form is clearly non-linear. I don't think that the form should be noted as linear just because a least squares line has been fitted to the scatterplot. The data set used for this question would have been much more fitted for purpose as a data transforming question to linearise the relationship. I hope students don't lose marks if they noted the from as non-linear.

[@MaffsGuru]

I think this is going to be one of those questions which is debated for weeks and years. I know we can spend hours quoting things, but the Cambridge book states the following: "The assumptions for fitting a least squares line to data are the same as for using the correlation coefficient, 𝑟 These are that: * the data is numerical * the association is linear * there are no clear outliers." As there is a least squares line, it would assume the above is true. I don't see how we can take out the point (5, 0.183) as there is nothing to say it's an outlier. Ultimately it will be down to VCAA to decide. But, we will never know what they accept. I worry about students who have "entered the data" as there was no data outside of that on the scatterplot. If they wanted a residual plot surely they would have given the raw data.

[@blix271]

Hi, Question 11b in matrices is 9 & 0 because why would you -9 people if they already left and transitioned to the leaver's category. Also Question 13b, it asks for route not the distance travelled.

[@MaffsGuru]

Hi! Thanks for the comment. I misread 13b. Sigh. I'll. update the video tomorrow. For 11b, I read it to mean that the number of people who are working there must remain at 180. If you don't take the 9 away, you will end up with S1 totalling 189. But I could be wrong.

[@beauworth3267]

@@MaffsGuru the bottom row suggests the number of people who left the work and never return, thus there’s no reason to remove them from the matrix, especially if there was a question after it that asked how many left the work after ‘x’ terms. The 9 in row one is just the 9 new workers who join

[@PoppyLong-be5yy]

Hey Maths Guru, for the matrices question 9c if we wrote I-H-E-G-F without the I at the end would it be still counted correct?

[@MaffsGuru]

I can't see how that will make a difference. I am hoping that VCAA will pay the mark out.

[@jp9166]

thank you so much for the help! i think i’ve gotten everything pretty much the same except for question 11b where i put 9 and then 0, because the question doesn’t say anything about removing the other ones! i’m not sure if this is right though😋

[@MaffsGuru]

I'm going to think more about this one. I will look at it again tomorrow and see if my answer is correct. I think it is ... but will check.

[@Pessimisticpaul]

Yes but eventually the amount of people leaving year to year would be more than the people at the circus no?

[@blix271]

@@Pessimisticpaul yes but what’s so bad? People come and go in jobs, I don’t see why that’s an issue. You only need 180 people to run the circus

[@Pessimisticpaul]

Yes but if you found like S40it would be like 360 people leaving the show that time period)not those who have already left) and this wouldn’t make sense as there’s only 180 at the show … I might be overthinking

[@manni24347]

@@Pessimisticpaul But the thing is it doesnt matter how many leave as long there are 180 people running the circus. + since the question states that once people leave never come back so I dont think we would subtract 9. But idk what vcaa is weird at times.

[@iradiusi]

At 29:08 you wrote seasonality however wouldn’t it be cycles because in my text book seasonality occurs within months weeks or days and cycles occurs in periods greater than 12 months which we can see in the 18th month to 30th month Also at 1:01:59 you say it’s 9 over -9, that. Wouldn’t that make it negative people leaving and isn’t the question asking to keep 180 workers in general when it shows 171 and 9 that means u have 9 leaving and 171 working which doesn’t keep the question correct

[@shutcapybara1142]

it won't be cycles becasue the question said why does it show seasonality meaning the graph has seasonality

[@MaffsGuru]

When you do the calculation with t*S0 + B, I think, if you don't have the bottom number as -9 then the total number of people in S1 would be 189. I could be wrong and will check tomorrow ...

[@iradiusi]

@@MaffsGuruI get where ur coming from, but the question says always 180 workers and u can’t really have negative leavers that doesn’t make sense but having the leavers at a random value shouldn’t change the 180 workers working at the circus

[@iradiusi]

@@shutcapybara1142oh you’re right my bad

[@sonny128]

Thanks always making great videos, truly the best in the field. I just have one question, as of 9 d. What do you think will happen to the question? It surly confused me, making me spend far to long staring, and questioning if it was right due to an extra 1.

[@MaffsGuru]

I think this was pretty poor from VCAA to make this basic mistake. But I think the question was still doable. I don't think VCAA will need to adjust anything as the extra 1 in the "H" column doesn't change the answers for the columns you were expected to complete.

[@brynhumberstone]

46:46 when you check the answer to 7c you don’t substitute the value of d back in (350.01) but if you had substituted it in, it would show that the loan isn’t fully repaid with that value of d. It seems to me that the minimum value of d that satisfies the conditions as specified is 350.02. Thoughts?

[@belindacaruso18]

I agree, I remember losing a mark for that exact reason in a previous exam, as the wording says it must be “fully relayed within exactly 3 more years” so I went with $350.02 as well

[@MaffsGuru]

I'll check it tomorrow. You are the second person who has suggested that it needs to be $350.02.

[@brynhumberstone]

I think it is a mistake in the question to assume that you can use a recurrence relation to model it all the way down to 0. There is a reason they usually ask about a different final payment, and I don’t understand why they chose not to here.

[@PoppyLong-be5yy]

It did say to the nearest cent and looking at last exam reports a question like this they accepted both answers idk

[@MaffsGuru]

Hi Bryn. Good to hear from you. I'm going to go back and look at the question again. I just assumed that the payment would clear the loan, I didn't go back and check. Sigh.

[@maitoo5428]

The GOAT has uploaded

[@MaffsGuru]

None of that sentence sounds good lol. Thanks for you comment and support! Wishing you the very best for the rest of the exam season and whatever comes next.

[@williamsaikaly4051]

THANKS DARREN! Really helped me out :)

[@MaffsGuru]

You are more than welcome! Thanks for making a comment! Really appreciate it.

[@williamsaikaly4051]

👍

[@shutcapybara1142]

Q13 b doesn't it ask for a route to travel not the distance traveled?

[@MaffsGuru]

Yes. I misread the question. I'll update it tomorrow.

[@Adonnus100]

I kinda like Q 13 actually. Seems much more straightforward to me than Q 14.

[@MaffsGuru]

That's god to hear :) I am going to work out how to make this question easier one day!

[@shutcapybara1142]

Q11 b why does the ones who leave need to be minus by 9 is there a reason that is can't just be 0? (just trying to justify my answer lol)

[@MaffsGuru]

I'll look at this again. I thought the question implied that there could only ever be 180 people working there. Which means the column in S1 would need to add to 180.

[@bucket6386]

hey, sorry to pester you but for 11. b, i put [9 0] as the answer, as opposed to [9 -9], i didn't think it would matter that the amount of people left would need to be brought back down to zero, would I be incorrect, i think I am also i can't believe i didn't pick up on 'large oysters' omfg thanks for making this video not even 24 hours after the exam!

[@MaffsGuru]

Hello. Thanks so much for making the comment! I think I might update my answer to [9 0]. I think I am still justified in my answer ... but it might make things easier.

[@blakemcclure8433]

Is question 13 ii correct. It says write down a route

[@MaffsGuru]

Nope. I misread the question which is really annoying! I'll correct it tomorrow. Thanks for picking it up though.

[@saisiddarthvarmanadempalli6705]

thanks soo much for uploading the answers so quick and i just have a question for 9a ive written it as 1/20 rather than 0.05 would i lose a mark for that?

[@MaffsGuru]

I don't think so as they are the same thing.

[@kimberleyfernandez4893]

i DID the same thing and i got worried 😭

[@saisiddarthvarmanadempalli6705]

oh thankgod and one last thing for "feature of this plot that is consistent with this time series having a seasonal component" ive written increasing trend is that completely wrong? @@MaffsGuru

[@MaffsGuru]

I think so yes. Sorry.

[@petrosmihalopoulos5151]

MAFFS GURU WE LOVE YOU - Class of 2023

[@MaffsGuru]

AND I LOVE YOU ALL BACK. Which is pretty exhausting LOL ... but you have been amazing!!! NOW ... go and spread the word about my channel and website to the Year 11's and your teachers and then live your life with as much success as you can. LOVE YOU ALL.

[@martinsoliman5762]

would you say this exam was kinda the hardest in the past 6 years? was it similar to 2021 in terms of difficulty? thank you

[@MaffsGuru]

I think this was one of the hardest I have done in a while. it was time consuming! I think question 13 was written by the Devil himself! But ... it's over now. We can breathe for a short while! There were some nice questions though ... so on balance it was OK.

[@emmy.vosper]

@@MaffsGuruI never thought I’d be happy with this for further maths, but I may have only dropped 8 marks, it felt a lot worse actually doing it lol

[@martinsoliman5762]

Thank you ☺️

[@ArshdeepSingh-m3p5v]

ITS UP

[@MaffsGuru]

As is my blood pressure! Fingers crossed I've not made any mistakes!!!

[@unknown__3724]

my paper one is in 9 days!! im beyond cooked but thank you for this😭i just hope i can land on a 30 study score😭😭😭

[@MaffsGuru]

You have got this! If you do 20 paper 1 and 20 paper 2 as practice (and I know you will think that you don't have time but you do!) research shows you can improve your raw score by 10!!! Seriously. And please ... reach out if there is anything more I can do to help. I have the whole course recorded at www.maffsguru.com and people tell me it's pretty good! Wishing you the very best of luck in 9 days time!

[@australia222]

Thanks so much for all the help this year! In your personal opinion, would you say this years exam was easier or harder than last years?

[@MaffsGuru]

I think the Paper 1 felt a lot easier than I have experienced before. There were some interesting questions, but on the whole I think it was totally manageable. Paper 2 felt a lot longer and some of the questions were very time consuming. The content had some interesting tricks in it, but again, seemed to cover the main areas of study. I think to consensus out there was that the exam was harder than others.

[@MaffsGuru]

And you are more than welcome for the help! It was my pleasure!!! I wouldn't be doing this if it wasn't for the support I get from you guys! So, thank you :)

[@Cylidee]

I was lowkey stressing if they would add leslie matrix questions, and if they would be vague about female populations or total populations but they didn't add a single leslie question for exam 2 😂😂

[@MaffsGuru]

I know!! How bloody annoying. All that work and nothing came of it. Oh well. Maybe next year. Not that you will ever have to worry about that. Well done for this year and the work you have put into it. Wishing you the very best for the rest of your exams.

[@Cylidee]

@MaffsGuru that's true and thank you!

[@mrsins329]

for 11B could not write matrix B with 9 on top and 0 on the bottom? Because it only asks to keep the workers at 180 and it doesn't say anything about resetting the amount of people that left to 0

[@MaffsGuru]

Good question. I think it works with both. I’ll take a closer look tomorrow.

[@jerrodbatallones5073]

hey maffs guru for question 13.b weren't we meant to write down a route rather then the minimum distance? anyway tysm for being so quick with the solutions, absolute goat!

[@MaffsGuru]

Yes indeed. I misread the question. Sigh. I'm going to update the video a little later today with the correct answer!

[@sadiqquadr7964]

Question 9c, it asks for "five towns", not 6. the I at the end wouldn't be included.

[@allahcomputerbigcool9665]

it says 5 locations, before starting the cycle again

[@MaffsGuru]

I think this will be paid.

[@davidliu3463]

VCAA just confirmed that question 9d was wrong, all students who attempted the exam are awarded a mark for 9d. but if study score is based on ranking, this means nothing😢

[@MaffsGuru]

I know! I heard about this last night :)

[@harryeagleson4415]

I noticed on question C, ii, that you changed your answer from 9.53 to 7.8 without stating why. How come?

[@MaffsGuru]

Hi. Ahhh! You seem to have caught an editing correction :) When I did the question first I must have got 7.8. I finished the recording paper and realised that I'd made a mistake. I went back and corrected the mistake for c ii and spliced it into the video not realising the wrong answer of 7.8 was still showing. I'm pretty sure the correct answer is 9.53 so please ignore the 7.8. I hope this makes sense!

[@sehariqbal9184]

Thank you maffs guru!!!

[@MaffsGuru]

You are more than welcome! Thank you do much for your comment and support. Wishing you the very best for the rest of the exam season and whatever comes next.

[@shutcapybara1142]

letss goo thanks for the swift upload

[@MaffsGuru]

It doesn't feel that swift, but I did all I could it get it out and as accurate as I can. Thanks so much for your support and this comment! Wishing you the very best for the rest of the exam season and whatever comes next.

[@bigballer1984]

For question 7 in finance would it be fine if I had a $ sign for each of my d values?

[@MaffsGuru]

Hi. I would imagine that they would take it into consideration. I don't mark for VCAA at the moment and so can't comment on what they will and wont accept, but it would seem reasonable to accept the $ sign.

[@bigballer1984]

@@MaffsGuru Thanks for all the help

[@michaeldesneves9584]

for question 8c if the zeros in the 3x3 matrix are 1 would that be incorrect?, thanks so much for your help this year!

[@MaffsGuru]

I'm sorry to say that it would be incorrect. It wouldn't give you the answer you were asked to get.

[@matteocantavenera3077]

For Q13B the questions says write down a route. If we answered like you did, and wrote 16.5km without a path do you get the mark?

[@MaffsGuru]

I know. Sigh. I didn’t read the question properly. I’ll update the video tomorrow and correct my mistake. I don’t think we will get the mark.

[@mrsins329]

for question 9c could you put H-E-G-F-I as it asks for the order in which the circus will visit the 5 towns, meaning that H is the first town that the circus visits?

[@MaffsGuru]

That’s a very good question. I don’t know to be honest. I’ll have a closer look at the question tomorrow.

[@SamWard-qd5um]

You’re a superstar MaffsGuru!

[@MaffsGuru]

Not really lol. All the students, like you, who took this exam today, you are the superstars!

[@jackieosullivan579]

Really appreciate your help during this exam period 😁😁

[@MaffsGuru]

You are more than welcome! Thanks so much for your support. Wishing you the very best for the rest of the exam season and whatever comes next.

[@erenkurucu5750]

I wanted to ask, for question 11.b: could you write 0 instead of -9 for the element in row 2, since that will still ensure that the number of workers in the circuis remain the same (only difference being that it shows the total number of workers which have left). So is that still correct? Thank you

[@MaffsGuru]

It's a good question. I'm going to go back and check today as I read it to mean that the total of the state matrices had to remain at 180.

[@belindacaruso18]

For question 7. c in finance, wouldn't you have to round up to 350.02? As it has to be fully repayed within exactly three more years of repayments, and if you do 156 payments of $350.01 you will still owe a few cents

[@MaffsGuru]

Possibly. I'll have a look at it again tomorrow. I'm pretty exhausted right now!

[@kimberleyfernandez4893]

i thought that too, but because it asks for it to be given to the nearest cent i think that is why it's 350.01

[@manni24347]

Shouldn't question 11.b) be a 9 0 matrix, as once people have left they are never coming back as mentioned in the question above.

[@MaffsGuru]

I read it to mean that the number of people who are working there must remain at 180. If you don't take the 9 away, you will end up with S1 totalling 189. But I could be wrong.

[@peterwang4628]

Why do I feel like for question 3 the line is non-linear?? It looks like there is a dip, maybe its just me.

[@shutcapybara1142]

it could be but its always assumed to be linear if we don't test it and it didn't ask/ give us a residual

[@MaffsGuru]

I think it is meant to be linear.

[@jonahkelly221]

i swear I thought the same thing, looks like a slight curve

[@timothynaya6100]

I already miss you, thank you

[@MaffsGuru]

Then let's not say goodbye, let's say ... until we meet again. If you stay subscribed, you can just dip into and out of my videos lol. A like here will always make my day! Wishing you the very best for the rest of the exam season and whatever comes next.

[@zacgoldman8874]

Hey Maffs Thanks so much for your video and your continued efforts, we all appreciate it! Quick question about q11a and q11b. for 11a, why do you need the '1' in element 2,2. It makes so impact on the actual equation. I put 0,0 for the second column. for 11b, I know a lot of people gave 9,0 not 9,-9. it is ambiguous IMO because they don't tell you to get rid of the 9 in the state matrix. nonetheless, I gave 9,-9. Please let me know and thanks again :)

[@shutcapybara1142]

q11a needs to be 1 because transition matrix columns must add to 1

[@zacgoldman8874]

gotchuuuu. silly by me @@shutcapybara1142

[@MaffsGuru]

Someone beat me to it! But ... with regards to 11b, I read it to mean that the number of people who are working there must remain at 180. If you don't take the 9 away, you will end up with S1 totalling 189. But I could be wrong.

[@danyshep7631]

@@MaffsGuru But it's asking for the workers in the circus to stay at a constant. not the number of workers. I'm probably wrong but that's how I interpreted it

[@davidliu3463]

question 13 was absolutely tourturing to do in the exam, considering how much time it wastes.

[@PoppyLong-be5yy]

Absolutely agree with you

[@MaffsGuru]

This might be why I am quoted as saying the question was written by the Devil himself! It was time consuming ... but perhaps there is an algorithm I don't know about or something I am missing.

[@IsaacBrennin]

@@MaffsGuruI think the m-j and l-n one can be done by odd vertices. Since a Eulerian trail has to start and end at an odd vertex, it must end at H, meaning that the shortest distance will include the shortest path connecting LN and MJ - hope that helps

[@e.c4524]

I was so panicked while doing this, and I made some silly mistakes even though I knew how to answer those questions😭

[@MaffsGuru]

The exam process is very challenging and I don't always think lends to students doing their best. I know sitting in a silent room with 100's of other people, trying to remember lots of content, having already had a lot of other exams, with the idea in my head that these are "the most important exams of my life" might not see me at my most relaxed! Don't worry ... everyone was in the same situation and lots of other people will have made an equal or greater number of mistakes. You have done your best! So, let's see what happens in December. Wishing you the very best of luck!

[@RileighWhitehead]

For question 13b you were meant to write the route not the distance

[@MaffsGuru]

I know. I’ve made a comment in the description. I misread the question. I’ll update the video tomorrow to correct this error.

[@RileighWhitehead]

@@MaffsGuru sorry! Didn’t notice the amendment in the description

[@MaffsGuru]

All good :)

[@ssj-shadow1184]

Hey Maffsguru, could you plot the graph on question 3 on a residual plot and tell us if you think its linear or nonlinear based on that?

[@MaffsGuru]

I think the fact that question is asking for strength, form and direction it suggests the line is linear. I don't think the exam would be asking for strength if it was non-linear as we can only use the value of 'r' for linear relationships.

[@jerrodzha5162]

If you are rank 1 and got 40/40 for exam 1 do u have to get 60/60 for exam 2 to get a 50?

[@MaffsGuru]

I really don't know to be honest. You would probably need to get a very high score on both papers. Each mark lost can be very bad in General Maths. Wishing you the very best of luck though.

[@francesabraham7241]

With question 1 c ii), wouldn't the value be 10.31, because that's the value you get after subbing 10 into the equation?

[@MaffsGuru]

No. I'm really sorry. It was a question about interpreting the gradient of the line. And this was 0.953. If we move 10 units in the x-direction, then the gradient will be 10 times the value given (9.53). The equations was not really relevant other than to test if you knew which part was the gradient and what it stood for.

[@PoppyLong-be5yy]

Hey maths guru this seems to be the hardest exam I done so does the study scores depend on your letter grade like a+ or the performance of the whole state cohort??

[@dionraymond8654]

i think 38 study score is like top 16% and top 8% is 40. its based on every further students result

[@MaffsGuru]

It was pretty challenging! Certainly in terms of time. I think the other comment makes more sense than I will at the moment

[@ausfrogs]

hi i do have a question with one of your solutions as when you interpreted the intercept you said it was at a temp of 0 degrees celsius, however on the graph it shows the intercept is at -10 degrees

[@MaffsGuru]

But it isn't. The intercept of any graph is when it crosses the point on the vertical axis which passes through 0. VCAA use this as a common trick every year. Normally they don't go into negative numbers, so this was a twist, but I promise you that the intercept is only every where the graph crosses the line where x=0.

[@PoppyLong-be5yy]

Hey maths guru for the matrices question 9c if we wrote I-H-E-G-F without the I at the end is it still correct because it did say write the order of the 5 activities and these are the 5 activities

[@MaffsGuru]

I can’t see how it would matter having the I there or not. The order is the same with or without the I. But only VCAA will know.

[@PoppyLong-be5yy]

Right so as long as the order is correct it is correct 🙏

[@PoppyLong-be5yy]

I really hope that it’s right because it is not telling u to give a path right?? But the order?

[@rajkhorevlog]

would you say this was a fair exam? or slightly harder than previous year's exams.

[@MaffsGuru]

I think it was certainly LONG! And it seemed a little trickier than previous years. There were some good questions. Question 13 was written by the Devil himself ... but otherwise, I think it was pretty fair.

[@minhvu4457]

for the d=90 question i wrote d=$90 is that okay?

[@MaffsGuru]

I can't see how they would dock you a mark for the dollar sign. But who knows with VCAA.

[@minhvu4457]

@@MaffsGuru i love you

[@MaffsGuru]

Thank you.

[@PoppyLong-be5yy]

Hey what is the grade would u need to get an a+ for general math this year for both exam 1 and 2?

[@MaffsGuru]

I'm sorry, but I really couldn't tell you. I don't have anything to do with grade boundaries and they are created from so many different things.

[@maowtf_]

wow i did a lot better than i thought lol i completely guessed some questions

[@MaffsGuru]

Congratulations! Well done!!!

[@thomasstephens2528]

The GOAT, thanks king!!

[@MaffsGuru]

Thanks so much. I really appreciate the comment! Wishing you the very best for the rest of the exam season and whatever comes next.

[@Randomuserjdndkdo20374ttyyreew]

Why is it extrapolation when -6 is in the data set?

[@MaffsGuru]

I'm sorry to say that it isn't in the data set. -4.5 is the smallest value. As -6 is further to the right, this means it is outside the data set and hence extrapolation.

[@crose4247]

Im really really disappointed at the amount of mistakes ive done. Ive lost so so so much marks. I actually give up now. I cant even be bothered with the rest of the exams ...given the amount of mistakes i do. Also why is it that people that may have adhd or take medication for it sit close to the vcaa observers...they walk around which distracts (i see them in the corner of my eye...one sat beside me...literally on the platform next to me) and its especially difficult to turn ur head to face the clock everytime. Also the desks are so small the bound reference book kept falling off the edge. Ive really had a stinker. My heart hurts and i just cant anymore. i also hate the time pressure ... I feel like... sometimes they really dont care about whether you actually understand the content or just are rushing, and copying notes and guessing and that. Seriously. Sorry i babled. I wish the education system could just ask students what they could do better. They really dont understand how we work...its all memory and repetition. Just learning to pass...not to live. I feel like my dreams are daydreams. I feel like even if there are other pathways...i wont do it anymore because im not confident...and it cost money. Taking a test cost money. Huff idk anymore. I guess some people have to give up. Give up on their dreams right.

[@MaffsGuru]

You must NEVER ever give up on your dreams. School is just a stupid stepping stone to the next thing in your life. Not doing as well as you would like is soul destroying. I know this as I was terrible in school. I hated Maths. I couldn't do it. I used to sit in the classroom with no idea what I was doing. If I can lift myself up and turn myself around, you can too. You have amazing value. You have so much to give. You've had a set back. This should not prevent you from going on and doing amazing things. The education system here is stupid. Full. Stop. It feels like it's stacked against you all the way. SACs,, the competition, not knowing what grade and study score you might be able to get etc. Sitting in a hall with people walking up and down, small desks ... these are all things which are not ideal. Who knows, one day, as a result of your experience, you might be the person to MAKE THE CHANGES to education it needs for all students. Please, do not give up. It's OK to feel upset and disappointed. You have worked bloody hard all year and it hurts when that doesn't seem to get rewarded. Take a small amount of time to be upset. But then you MUST, MUST, MUST put it behind you and keep going. The rest of your exams might surprise you and you might do amazingly well. Then General becomes irrelavant. Wishing you all the best for the rest of the season. Go out there and be the best success you can.

[@srishtiskamlu2223]

LEGENDDDD

[@MaffsGuru]

Not really! But thank you for your comment! And support. Wishing you the very best for the rest of the exam season and whatever comes next.

[@JannatSha-h6f]

Omg Legend!!! Got mostly correct, but the very last question 😂. Literally did it wrong. But the good thing was I knew how to do it since I have watched you but cause of time couldn’t manage to do it. But it’s all good. I wanted to tell you that when I was doing the paper I knew how to do all of them other than like 2-3 questions, and guess what! All thanks to you from actually breaking down the questions and answering them. I have learned a lot. ❤❤

[@MaffsGuru]

Well done! Really impressed then and thanks so much for the kind comment about my content and the help you think it's been. Really appreciate it! Wishing you the very best of luck for the rest of the exam season :)

[@Pessimisticpaul]

For 3 D am I just wrong if I interpreted the x -axis intercept?

[@MaffsGuru]

Sadly yes. I’m so sorry!

[@Pessimisticpaul]

@@MaffsGuruwhy is this the case if it didn’t specify which intercept?

[@MaffsGuru]

There is only one intercept when we talk about a graph. That's the one which passes through x = 0. This graph was a "trick" by moving the line to the right. But the intercept is defined as being the line through the point where your EV is equal to zero.

[@jgl314]

Hi there, Thanks for your answers, I can't believe I didn't pick up on "large oysters" rather than all oysters for Q1bii... EDIT: it seems like others have already talked about Q11b and Q13c, so feel free to ignore those points...I'll leave them here in case someone doesn't dig through the other comments to find these ideas. For Q11b I think that the element b21 could in theory be anything? The question just states that the number of works (not total people) to remain at 180. For that to occur, only b11 must be 9, as the other value just changes the number of leavers. Some potential ambiguity here from VCAA. For Q13b, there is an alogirthm that solves this, however it is a modified version of Dijkstra's Algorithm that is not part of the study design (and I've only seen how to program it and not undertake it by hand/CAS). My 'method' was creating the minimum spanning tree and then using that as a starting point for guessing and checking alternatives (given that in some cases edges that were not on the tree were shorter as they didn't require backtracking), but I can't say it was the 'best' way. For Q13c I got the same answer but know a method to prove it. My rationale was that it must be an Eulerian trail (different start/finish, follows every road). Eulerian trails require all vertexes to have an even degree except for two with an odd degree. G, H, J, L, M, and N all have an odd degree. The process of travelling along a ride twice is equivalent to adding an edge, so we can travel along a road twice connects these vertex to, in essence, change their degree from odd to even. The possible options are G - H, G - N, J - M, and L - N. However, any combination with G can be excluded, as it is the starting point it will always have an odd degree, so J - M and L - N are the only possible options remaining. Thanks again for your walkthrough!

[@neelgera9135]

Yo what about the Farm A Farm B question, I said no because it asked for the greater capacity Not greater proportion?

[@MaffsGuru]

Thanks so much for your comment! I really appreciate it!!

[@jgl314]

@@neelgera9135 Fair point, not the best wording. I'm almost certain that what VCAA would have wanted was the greater proportion, regardless of how 'capacity' is defined. The questions also does specifically ask to compare appropriate percentages, rather than raw values.

[@neelgera9135]

@@jgl314 ye but can’t you do whole %s? Like 44/530 and 46/530? One is 8.4% and other is 8.6% But ye idk, the wording killed me

[@vinith8977]

I forgot to add (km) after 5.9, is that a unit mark lost?

[@MaffsGuru]

I don't think so. I think you will be OK!

[@williambrizzi9949]

Im pretty sure the form is non-linear btw (hence the curve followed by the data points at the bottom and the point above is ment to throw you off) Also one question you wrote 16.5km or something instead of the route needed. Also with the 9, -9 matrice i think its just 9, 0 as the number of ppl who've left stays the same

[@williambrizzi9949]

And question 2b ii) the question tells u to quote 2 STATISTICS, unlike the 4 u have quoted

[@MaffsGuru]

I said in the video that I wasn't over convinced about the wording. I over quoted but, so long as my additions are correct, VCAA will mark them correct.

[@MaffsGuru]

I know about the 16.5km. I got so used to that style of question wanting the length, I didn't read the question properly. I'll update the video tomorrow with the correct answer. The matrix one, I read it to mean that the number of people who are working there must remain at 180. If you don't take the 9 away, you will end up with S1 totalling 189. But I could be wrong.

[@jeybenoval]

hey maffsguru i saw an article on the herald sun about a third possible error in question 7c bcos we cant get the loan to exactly zero without changing the value of the last payment- do u think vcaa will just take the answer to the nearest cent like u gave?? or give everyone a mark for that question

[@MaffsGuru]

I don’t think it was an error. I think that rounding always wins out. So I think my answer is correct. I don’t know what VCAA will do but hopefully they look at the question and make the right decision. Normally they would say in the question that the final payment would be different. Even without this, you would have rounded normally. But again, who knows.

[@PoppyLong-be5yy]

Hey maths guru for that permutation matrix error will they give us the mark bc of the error or what like how does it work??

[@PoppyLong-be5yy]

Like in the past what did they do when something like this happened??

[@MaffsGuru]

I don’t think so. The question could still be answered and I don’t think it fundamentally changed your ability to answer it as the 1 wasn’t in any of the columns which you needed to complete. I doubt that most people even knew there was an error.

[@minhquachvan2387]

hey maff guru, for question 3c is it linear or non-linear cause when I try to construct the residual plot, there is clearly a pattern but you said that if the question asking for strength it must be linear but I came across question that they are asking for strength/r/r^2 but the correlation is non-linear

[@charlottea4199]

I said non-linear too!!

[@MaffsGuru]

Hi both. As they gave you the equation of the least-squares line, this can only be created if the data is linear. The fact that gave r^2 too, which means there is an 'r' means this was linear. I know some people are saying that they have tried to create the residual plot, but there was no need and it didn't help. I think people have over complicated this question. I am so sorry.

[@mrsins329]

why did your answer for 1cii change from 9.53 to 7.8 at 7:33

[@MaffsGuru]

Ignore the 7.8. I redid the answer to c and I wasn’t going to redo the rest of the questions again as I was time pressured. The correct answer is 9.53.

[@blakearmour3069]

I've just got a question about the final matrix question, as each circus needs 180 employees, and once they leave they leave would 9 in b11 and 0 in b21 also technically be correct as it doesn't affect the amount of employees staying

[@MaffsGuru]

I read it to mean that the number of people who are working there must remain at 180. If you don't take the 9 away, you will end up with S1 totalling 189. But I could be wrong.

[@blakearmour3069]

@@MaffsGuru i thought 9, -9 initially as well but then it would negate the entire equation, and since L represented the amount of employees leaving, that would continue to tally

[@winstonnguyen8921]

for question 9a can you do 20 inverse?

[@MaffsGuru]

I think that 20 to the power of -1 should be ok.

[@joeloakley7609]

13 B should be G-H-K-I-J-M-O-L-N-G YOU DON'T NEED TO NOTE THE ACTUAL DISTANCE

[@MaffsGuru]

I think I made this comment somewhere else lol. Thanks so much for pointing this out again.

[@nikolasludwig7764]

Hell yeah I got question 1 right

[@MaffsGuru]

And I am very proud of you! But seriously, I hope you got a lot more right than that. Wishing you the very best for the rest of the exam season and whatever comes next.