Cross Multiply

Рет қаралды 48,793

Mr H Tutoring

Күн бұрын

Пікірлер: 59

@mivids100 10 ай бұрын

I never get tired of watching your content

@jadajamb 10 ай бұрын

A shorter way is ..Just do a reciprocal on both sides. and separate terms.

@franklinemix8048 10 ай бұрын

Exactly the method I used.

@Prathap_7055 10 ай бұрын

@@franklinemix8048we 3 thought this on the first sight of this problem 😅

@carlcairns4078 10 ай бұрын

Mr H. Great teacher! ❤❤

@Itachii345 10 ай бұрын

In the Q. We are asked with ratio/Fraction of n:m so you could even transfer like this: -2m=n -2=n/m (Here is your answer!)

@Gbhmagic 10 ай бұрын

very cool. im studying Trig on my own from books now. Saddly in the US the schools all are utterly dependent on graphing calculators.. The text books are.not just 600$ but also are essential nothing short of a manual for whatever the calculator the school is selling.

@SwitchRoomCafe 10 ай бұрын

Instead of plugging in (-2m) for n, you could've taken (-2m) = n and divided m, giving you -2=n/m, which was the question. I love finding more than one way to solve a problem, even if it's not drastically different.

@foxster.mp4 10 ай бұрын

We don’t know if m is nonzero tho. Would that be an issue?

@aleycolt3824 10 ай бұрын

@@foxster.mp4 we do know that m is non zero from the equation. If m were zero, it would be 0/x which equals 0 and not 1/5. (if x were 0, as it should be, we would have 0/0, which is also not 1/5) It's also why we can cancel the m in the second part. I hope a lot of questions like this state that m=/=0 though.

@83Mohamad8Hassn 10 ай бұрын

❤❤🎉🎉😊😊

@mircoceccarelli6689 10 ай бұрын

👍👍👍🤪👋

@muzakkyadhitya6471 10 ай бұрын

From the equation, can we assume that m=1 and 3m-n=5? 3m-n=5 3(1)-n=5 n=-2 n/m=(-2)/1=(-2)

@thedeadly8190 10 ай бұрын

No bro ..this is wrong

@muzakkyadhitya6471 10 ай бұрын

@@thedeadly8190: Why wrong?

@thedeadly8190 10 ай бұрын

How can we assume without solving it on top of that 3m-n can't equal to 5.it is not mentioned hope you got my point😊@@muzakkyadhitya6471

@aleycolt3824 10 ай бұрын

The danger of your answer is that we cannot assume the values of m or n. In fact we are not required to know the values. The answer merely requires us to determine the relationship between n and m. If I assumed m=5, then I could still get n/m=-2 (n would be -10) The assumption works because the relationship is linear. This question is designed to test your ability to cross multiply and perform a subsitution. If later questions involved multiple powers (quadratic equations) or other functions, your method would prove wrong as the top could be strictly less than 1

@apexgoblin 10 ай бұрын

well 2/10, 3/15, 4/20... are also equal to 1/5. Why don't you take m=2 or m=3 or any other real number

@OPNURISYDER 10 ай бұрын

Thank you, Professor!

@Life2Live4u 10 ай бұрын

Интересно

@dougr.2398 10 ай бұрын

This can be figured out “by inspection”. (Mental “eyeballing”) by dividing both sides of the fraction on the left by m. This leaves you one on top and 2- n/m as the denominator, which in order to equal 5, requires that n/m = -3

@wbug 10 ай бұрын

I think that might be a typo..?

@dougr.2398 10 ай бұрын

@@wbugthere is more than one error, no typos 😊

@dougr.2398 10 ай бұрын

Just switch the 3 and the 2

@wbug 10 ай бұрын

Yup@@dougr.2398

@wbug 10 ай бұрын

But correct explanation

@EUTSTube 10 ай бұрын

I made the reciprocal of the equation (3m-n)/m=5; 3 - n/m = 5 Finally transposing n/m then getting 3-5=-2

@luisclementeortegasegovia8603 10 ай бұрын

Always a nice and productive class! Thanks! 👍

@hiyelow2999 10 ай бұрын

Um, shareholder percentage?? What is shareholder percentage and dividends?

@AramLyricMashups 10 ай бұрын

I also got -2 but in a different way

@frederickwilt5541 10 ай бұрын

Good stuff

@Harsh-bg4po 10 ай бұрын

Thank you sir

@olenhol2przez4 10 ай бұрын

m/3m-n = 1/5 => m=1 3m-n=5 => 3*1-n=5 => n=(-2) n/m = -2/1 = -2... Why overthink it...

@andrewclifton9772 10 ай бұрын

m / (3m - n) = 1 / 5 ; Divide top and bottom of the LHS by m 1 / (3 - (n / m)) = 1 / 5 ; So left denominator = right denominator 3 - (n / m) = 5 ; So n/m = -2

@Quest3669 10 ай бұрын

Better u reverse both side .. now very easy to find

@joecortizo 10 ай бұрын

You could also apply ^-1 to each side, then cancel 3m with m, then you'd have n/m=-2. Good Lord, I'm smart... 😂

@anderslvolljohansen1556 10 ай бұрын

-2m=n, divide by m on both sides: -2=n/m

@Exler_Ko 10 ай бұрын

Actually you could just ÷m by both side to get the answer

@Geoffsmeg 10 ай бұрын

Thank you 😀🙂+=++=-%

@Harsh-bg4po 10 ай бұрын

Sir please upload shorts on integration

@shahbazahmad8972 10 ай бұрын

which level integration؟

@shahbazahmad8972 10 ай бұрын

which level integrate?

@sailexw6414 10 ай бұрын

I got to it like this: seperate: m/3m - m/n = 1/5 flip: 3m/m - n/m = 5 simplify: 3-n/m = 5, -n/m = 2, n/m = -2

@shashibalarai1146 10 ай бұрын

I did this by comparing LHS and RHS I.e. Given: m/( 3m - n) =1/5 So let LHS numerator = RHS numerator I.e. m=1 And LHS denominator = RHS denominator I.e. 3m - n = 5 ( now putting value of m from above, we get) 3(1) - n =5 3 - n = 5 n = -2 Evaluating n/m we get -2/1 I.e. -2 Is this a wrong method 🤔