(3r-2)(r-2) solve with algebra tiles

David must install fencing around a lot that is shaped like a right angle. the side of lot that runs east-west is 200 ft long. the side of the lot runs north-south is 125 ft long. calculate how many feet of fencing he will need to surround the entire lot.

Diana is painting statues she has 7/8 of a liter of paint each statue requires 1/20 of a liter of paint how many statues can she paint?

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36