I need to know the answer plz

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.

One positive number is 9 more than twice another. if their product is 95, find the numbers

Polynomial that can be factored as (3x-4)(3x+4)