SOLUTION: I am not understanding how to work this problem out. Perimeter of a rectangle. The width of a rectangle playground is 2x-5 feet, and the length is 3x+9 feet. Write a polynomia

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: I am not understanding how to work this problem out. Perimeter of a rectangle. The width of a rectangle playground is 2x-5 feet, and the length is 3x+9 feet. Write a polynomia      Log On


   



Question 146314: I am not understanding how to work this problem out.
Perimeter of a rectangle. The width of a rectangle playground is 2x-5 feet, and the length is 3x+9 feet. Write a polynomial P(x) that represents the perimeter and then evaluate this perimeter polynomial if x is 4 feet.

Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
perimeter=2L+2W
per=2(3x+9)+2(2x-5)
per=6x+18+4x-10
per=10x+8
if x=4 then
per=10*4+8
per=40=8
per=48 feet.