What number must be added to the expression x^2-22x below
to complete the square

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.

The graph shown is the graph of which function?

Apackage of five erasers cost 0. $.39 at this rate how many how much would 60 erasers cost in dollars and cents