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#1**+2 **

You're right! Here's an explanation:

perimeter of a rectangle = length + length + width + width

P = L + L + W + W

P = 2L + 2W

To solve this equation for L , subtract 2W from both sides.

P - 2W = 2L

Divide both sides of the equation by 2 .

(1/2)(P - 2W) = L

P/2 - W = L

L = P/2 - W This is a formula just like the quadratic formula is a formula.

hectictar Sep 8, 2017