SOLUTION: A rectangle has sides of 3x – 4 and 7x + 10. Find the expression that represents its perimeter.

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Question 111493This question is from textbook
: A rectangle has sides of 3x – 4 and 7x + 10. Find the expression that represents its perimeter.This question is from textbook

Answer by solver91311(12126) About Me  (Show Source):
You can put this solution on YOUR website!
The perimeter of a rectangle is given by P=2l%2B2w
:
Let's say that l+=+7x%2B10 and
w=3x-4
:
Substituting for l and w:
P=2%287x%2B10%29%2B2%283x-4%29
:
You could quit right here, but you probabaly would want to put the expression in simplest terms.
:
P=14x%2B20%2B6x-8
P=20x%2B12