The perimeter of a rectangle is 62 meters. The length is 4 more than 2 times the width. What is the length?

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.

Complete the equation of the line through (−10,3) and (−8,−8). use exact numbers.

I'm confused on this could anyone me and show me what i need to do to solve it.