A rectangular pool has dimensions (2x + 11) and (7x + 4). If a 10 foot wide cement walkway is placed around the pool, find the dimensions of the walkway. (PLEASE ANSWER I NEED IT!!!)

This is so harddd! solve. 1 + 1 = solve 4 + 4 = solve 3 x 3

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.

If the perimeter of the garden is 37 ft. the width is x and the length is 15 ft. what is the width of the garden in feet?