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

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Question 124246: A rectangle has sides of 3x – 4 and 7x + 10. Find the expression that represents its perimeter.
Found 2 solutions by solver91311, MathLover1:
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!
The perimeter of a rectangle is given by P=2L%2B2W. You are given that:

W=3x-4 and
L=7x%2B10

All you need do is substitute the expressions for L and W into the formula for the perimeter. Also, technically speaking, all you can do is find AN expression that represents the perimeter since there are several depending on how much you simplify the expression once you have made the required substitutions.


Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
sides:
a=3x-4
and b+=+7x+%2B+10
perimeter P+=+2%28a%2Bb%29
P+=+2%28%283x-4%29%2B+%287x+%2B+10%29%29
P+=+2%283x-4+%2B+7x+%2B+10%29
P+=+2%2810x+%2B+6%29
P+=+20x+%2B+12