SOLUTION: the perimeter of a rectangle given that the length is x yards and the width is 10 yards shorter

Algebra ->  Rectangles -> SOLUTION: the perimeter of a rectangle given that the length is x yards and the width is 10 yards shorter      Log On


   

Question 295583: the perimeter of a rectangle given that the length is x yards and the width is 10 yards shorter
Answer by Deina(147) About Me  (Show Source):
You can put this solution on YOUR website!
Ok,
Length = x
Width = x - 10
Perimeter = 2(L + W)

We substitute "x" for length, and "x - 10" for width:
Perimeter = 2(x + (x - 10))

Now distribute:
Perimeter = 2x + 2x - 20 Combine like terms:
Perimeter = 4x - 20 & bob's your uncle!