Suppose you are building a rectangular pen for your goats. you use 400 feet of fencing for the pen. let represent the pen’s length (in feet).
part a: which of the following expressions could represent the width of the pen?
a 2+400 b 200− c 2−400 d 400(2)
part b: find the width of the pen if you make the pen 80 feet long.
part c: find the width and the area of the pen if the length is 90 feet.