Sample Response: List the factors of each number. Then circle the common factors. Finally, identify the greatest of the common factors. The GCF of 54 and 42 is 6.
P = 2w + 2l where w is the width, and l is the length. We know the length (l) is 3 inches longer than it's width (or l = w+3). Substitute w +3 into Perimeter equation. P = 2w + 2(w+3).
