Question 901693
The length of a rectangle is x in, its width is 3 in shorter than the length. Compose an
 algebraic expression for the perimeter of the rectangle. Find the value of this expression
 if x = 2. 


length = x

width = x - 3

Perimeter = 2 times length + 2 times width

P = 2x + 2(x - 3)

Now replace every x you see with 2 and do the math.

P = 2(2) + 2(2 - 3)

P = 4 + 4 - 6

P = 8 - 6

P = 2

The answer is 2.