Question

P

=
2
L
+
2
W
to find the length of a rectangle when the width is
4 1/2



inches and the perimeter is
29 2/5
inches.

Answer 1

10 2/5 inches

Explanation:

Since P=2L+2W, we can flip it to find the length. For example, we could minus 2L from both sides to get P-2L=2W.

We already know that W is 4.5, and P is 29.4.

Plugging that in, we get 29.4-2L=9. Again we can flip the perimeter, and -29.4 on both sides. This would make -2L=-20.4.

For our last flip, we divide the -2 from both sides to finally get L=10.2 (or 10 1/5 if you want) inches.