SOLUTION: I have a question on this word problem: A triangle has sides 3x + 7, 4x - 9, and 5x + 6. Find the expression that represents its perimeter. I have nothing on this I am at a lost a

Algebra ->  Expressions-with-variables -> SOLUTION: I have a question on this word problem: A triangle has sides 3x + 7, 4x - 9, and 5x + 6. Find the expression that represents its perimeter. I have nothing on this I am at a lost a      Log On


   



Question 109586: I have a question on this word problem: A triangle has sides 3x + 7, 4x - 9, and 5x + 6. Find the expression that represents its perimeter.
I have nothing on this I am at a lost and do not know where to beginI know i have to write an equation but sometimes this is just so foreign to me any assistance would be appreciated.
Thank you, Barb Neely

Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Remember the perimeter is the sum of all sides of a triangle. So if the sides are 3x + 7, 4x - 9, and 5x + 6, simply add them all up to get

Perimeter=%283x+%2B+7%29%2B%284x+-+9%29%2B%285x+%2B+6%29

Perimeter=%283x%2B4x%2B5x%29%2B%287-9%2B6%29 Group like terms

Perimeter=12x%2B4 Combine like terms