# Thread: algebraic expression

1. ## algebraic expression

the length of a rectangle is (2x-5) and its width is (x+7). Write an algebraic expression showing the amount of fencing needed to enclose the rectangle.

2. Originally Posted by blame_canada100
the length of a rectangle is (2x-5) and its width is (x+7). Write an algebraic expression showing the amount of fencing needed to enclose the rectangle.
You want the perimeter of the rectangle. Given a length l and a width w this is
$P = 2l + 2w$

You take it from here.

-Dan