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.)

Answer 1

put P=1550 into your equation and solve it

Answer 2

1550 = -x^2 + 105x - 1050
-x^2 + 105x - 2600 =0
x= 40 or x=65
lowest price =40

Answer 3

What Callisto said.