Given that (4,-8) is on the graph of f(x), find the corresponding point for the function f(x+3)

Answer these questions showing your work 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.

Which of the following best describes the delian problem?