SOLUTION: Perimeter of a rectangle. The width of a rectangular playground is 2x _ 5 feet, and the length is 3x _ 9 feet. Write a polynomial P(x) that represents the perimeter and then eva

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Perimeter of a rectangle. The width of a rectangular playground is 2x _ 5 feet, and the length is 3x _ 9 feet. Write a polynomial P(x) that represents the perimeter and then eva      Log On


   

Question 191724This question is from textbook Elementary and Intermediate Algebra
: Perimeter of a rectangle. The width of a rectangular 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. This question is from textbook Elementary and Intermediate Algebra

Answer by RAY100(1637) About Me  (Show Source):
You can put this solution on YOUR website!
per = 2l + 2w = 2(3x-9) + 2(2x-5) = 6x-18 +4x -10 = 10x-28
for x=4, per = 10 (4) -28 = 12
check 3x-9 = 3(4) -9 = 3
2x-5 = 2(4)-5 = 3
per = 2(3) +2(3) = 12 ok