QUICK If r+t = r and r−t = −s which of the following must be equal to t? (A) −s
(B) −r
(C) 0
(D) r
(E) s

Factor completely. 4p^2 + 36p + 81 express the answer in the form (ap + b)^2

Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.

Which system of linear inequalities is represented by the graph?