Grade 10 Quadratic Word Problems - Maximizing Revenue, Profit

[@vedpatel6515]

Thank you for making this video, it helped me a lot. This was very useful to me as I have a grade 10 ib math test tomorrow. Keep up the good work!

[@mshavrotscanadianuniversit6234]

Best of luck! although if you've done the work it will be easy! Keep watching ... I have all of grade 11 and 12 here for you as well. Please encourage your classmates to subscribe : ) Thanks!

[@mariana.navarro]

On the factoring question, when you do this -15+20/2 on the parabola, are you dividing by two just because or is it the number of things sold if there’s a decrease(I have a similar homework question but the number of sold things starts at 4, so would I divide by two or four?) 18:08

[@mshavrot_math]

I am dividing by two because I have the two zeros of the graph (where it crosses the x axis) and in order to find the maximum or minimum value I need to find the axis of symmetry, so I’m finding half way between these two values by dividing by 2. Just like if I asked you what is the halfway point between 10 and 20 (which you intuitively know is 15) the actual math is to add 10 + 20 and then divide by 2. Does that help?

[@Motoko-d7h]

Amazing video, thank you Ms. Havrot.

[@mshavrotscanadianuniversit6234]

You're most welcome! Thanks for watching! ❤️

[@betterhansin]

Does it matter if you use zero product rule or complete the square? I prefer completing the square.

[@mshavrotscanadianuniversit6234]

Using the zeros and finding the axis of symmetry and then the maximum height OR completing the square are both good methods. Depending on what your teacher asks. I think understanding why and how they both work is important.

[@KhaiTran-og6xy]

how'd you get 0.2x =-2

[@mshavrotscanadianuniversit6234]

Could you please tell me where on the video you are referring to? 😊

[@RackDefender]

Great video

[@mshavrotscanadianuniversit6234]

Thanks! Keep watching! I will make you math wise! : )