Points A, B, and D are on both planes.

Based on what i know about mean, this doesn't add up.

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

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.