SOLUTION: the perimeter of a triangular dog pen has one side represented by 2x, another side represented by x + 19 and the third side represented by 3x + 6. Find the algebraic expression fo

Algebra ->  Linear-equations -> SOLUTION: the perimeter of a triangular dog pen has one side represented by 2x, another side represented by x + 19 and the third side represented by 3x + 6. Find the algebraic expression fo      Log On


   

Question 255852: the perimeter of a triangular dog pen has one side represented by 2x, another side represented by x + 19 and the third side represented by 3x + 6. Find the algebraic expression for the perimeter. Find the numerical perimeter if the value of x is 5 feet. there are 2 answers and i must simplify this expression. I have no idea how to do this. please help.....

Found 2 solutions by solver91311, stanbon:
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


The perimeter of any polygon is simply the sum of the measures of the sides. Here, you have three sides:



Just collect like terms to simplify. Once you have a simplified expression, substitute 5 for the variable and do the arithmetic.

John

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
the perimeter of a triangular dog pen has one side represented by 2x, another side represented by x + 19 and the third side represented by 3x + 6. Find the algebraic expression for the perimeter.
Perimeter = 2x + x+19 + 3x+6
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Find the numerical perimeter if the value of x is 5 feet. there are 2 answers and i must simplify this expression.
P(5) = 2*5 + 5+19 + 3*5+6
P(5) = 10 + 95 + 21
P(5) = 126
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Cheers,
Stan H.