Determine profit using quadratic function

Question

Manu wears determined that the demand for their suits is given by ; d=1.9(175-p) where d represents the demand an do represents the price of a suit. Additional research shows that the cost of producing x suit is given by C(x)359+0.75x.

a)find an expression which will determine the profit the company would make on selling x suits.

b)determine the number of suits that the company mystery produce and sell in order to make maximum profit

c)determine that maximum profit.

d)at what pride should a suit be sold in order to maximize profit?

Answer 1

The first equation is not thoroughly explained, you define d and do? but the equation does not have do. in the second I guess that x is the number of suits, is it true?