The manager of the local comunity pool is adding a tile border around the rectuangular pool. let x represent the wiudth of the , in feet. the length is 3 1/2 more than 2 1/2 times the width, as shown write 2 expressions that represent the perimeter of the pool.
on the model it says
height: x
width: 2 1/2x * 3 1/2