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

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) (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.
RELATED QUESTIONS
I am not sure how to do this type of problem :( The perimeter of a rectangle is 84 ft.... (answered by HyperBrain,josmiceli)

I need help in getting an answer to this problem. What formula is used. Perimeter of a... (answered by checkley77)

The perimeter of a rectangular backyard is 6x + 6 yards. If the width is x yards, find a (answered by richwmiller,stanbon,checkley77)

i NEED HELP TRYING TI FIGURE THIS OUT. PERIMETER OF A RECTANGLE - THE WIDTH OF A... (answered by ankor@dixie-net.com)

I'm not sure how to figure this problem out If the perimeter of a rectangle is 74... (answered by JulietG)

I am not understanding how to work this problem out. Area of a Parallelogram. Find a... (answered by checkley77)

Perimeter of a rectangle. Question: the width of a rectangular playground is 2x - 5... (answered by Nate)

Suppose that the width of a rectangle is 5 inches shorter than the length and that the... (answered by richwmiller)

I need to know how this answer derived: I figured it out, but I do not know how I figured (answered by oberobic)