Question

A company's monthly profit, P, from a product is given by P = −x2 + 105x − 1050, where x is the price of the product in dollars. What is the lowest price of the product, in dollars, that gives a monthly profit of $1,550? (Do not put a $ in your answer.) @jim_thompson5910

Answer 1

is it 40 ?

Answer 2

I don't know, Gaby, is it? Show us your work.

Answer 3

1550=-x^2+105x-1050
x^2-105x+2600=0
(x-40)(x-65) = 0
x = 40

Answer 4

Subtract 1,550
x cannot be negative so multiply it by -1
Factor
Solve for x

Did I read that right?

Answer 5

am i wrong lol

Answer 6

Nope. (;

Answer 7

yay me

Answer 8

@Gabylovesyou i wouldn't have given you a medal if you were wrong :P

http://www.wolframalpha.com/input/?i=1550%3D-x%5E2%2B105x-1050

Answer 9

:DDD