SOLUTION: The width of a rectangular playground is 2x - 5 feet, and tthe length is 3x +9 feet. Write polynomial P(x) that represents the perimeter and then evaluate this perimeter polynomia

Algebra ->  Numeric Fractions Calculators, Lesson and Practice -> SOLUTION: The width of a rectangular playground is 2x - 5 feet, and tthe length is 3x +9 feet. Write polynomial P(x) that represents the perimeter and then evaluate this perimeter polynomia      Log On


   

Question 96235: The width of a rectangular playground is 2x - 5 feet, and tthe length is 3x +9 feet. Write polynomial P(x) that represents the perimeter and then evaluate this perimeter polynomial if x is 4 feet.
This is my first class in Algebra, kindly help me to solve this word problem.
Answer by tutorcecilia(2152) About Me  (Show Source):
You can put this solution on YOUR website!
Use the formula for perimeter:
P=2[length + width}
P=2[(2x-5)+(3x+9)] [plug-in the values and simplify]
.
P=2(5x+4)
P=10x+8
.
P(4)=10(4)+8
P(4)=40+8
P(4)=48