The price of a cd was decreased by 20% to £7.68. What was the price before the decrease?

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.

Select the quadratic that has root x = 8 and x = -5

Me n o w. i need t h i s. 10 points