Pedro has a rectangular pool in his backyard that is 12 ft long and 3 ft wide. A resort has a pool that is similar in shape as shown. if the width of the resort pool is 6 ft what is the difference in perimeter of the pools in inches.

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle.he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field