Question

The amount of revenue a company makes per day by selling x items is given by the function f(x) = 14x - 0.2x2. How many items should be sold if the company wants to maximize their profit?

30 items
35 items
70 items
40 items

Answer 1

Can you put that in vertex form?

Answer 2

i don't know

Answer 3

Complete the square to get it in that form

Answer 4

i'm not sure how to do that

Answer 5

rearrange it to -1/5x^2+14x

Factor out the -1/5. what do you get?

Answer 6

i'm sorry i don't know how to do that either

Answer 7

Divide everything by -1/5