SOLUTION: A triangle has sides 3x +7, 4x -9, and 5x +6. Find the expression the represent its perimeter.

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Question 93839: A triangle has sides 3x +7, 4x -9, and 5x +6. Find the expression the represent its perimeter.
Found 2 solutions by checkley75, jim_thompson5910:
Answer by checkley75(3666)   (Show Source): You can put this solution on YOUR website!
3X+7+4X-9+5X+6
12X+4
4(3X+1)

Answer by jim_thompson5910(35256)   (Show Source): You can put this solution on YOUR website!
Start with the given formula for finding the perimeter of a triangle

where P is the perimeter and the S terms are the side lengths


Plug in the given sides

Remove the parenthesis

Group like terms

Combine like terms


So the expression that represents the perimeter is

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