Question

Students are selling t-shirts to raise money for the recycling club. The profit that they make is given by the expression P = - (21 – 2x)(2 – x).

Answer 1

In this equation a question is asking what the zeros repersent

Answer 2

You mean if P=0 or if x=0?

If P=0 then it would mean they broke even from selling X amount of shirts, if X is 0 then they did not sell any shirts and P would be negative.

Answer 3

Can you please explain that more, thats what my teacher said but I did not understand

Answer 4

Broke even, what does that mean

Answer 5

So basically, if you want to buy shirts, let us say each shirt cost you $2 to buy, and you buy 10 of them, so you just paid $20 for the shirts, if you sell 0 shirts you lost $20, now lets say you start selling the shirts at $5 each, if you sell 4 shirts at $5 each, you got $20 back, so you spent $20 and made $20, so you just broke even, then any shirt you sell past those 4 you will make a profit on, does that make sense? :)

Answer 6

Ooh, Thanks soo much

Answer 7

Also the h = for the vertex is 6.25 but i think its wring and should be 11.5

Answer 8

Because we add s + r divided by 2

Answer 9

21 + 2 /2

Answer 10

Hmm, i'm not sure, if your teacher made up that profit model then it could vary on what they are trying to show.

Answer 11

How would I find the vertex of this

Answer 12

What do you mean by vertex? The most amount of money they could make?

Answer 13

The vertex of the parabola formed by this equation

Answer 14

@edlevin

Answer 15

One second let me plot it

Answer 16

Here is the graph I got:

With a max at x=25/4 so P=289/8