Question

A triangle has 3 sides 3x+7,4x-9,5x+6. How do you find the expression that represents its perimeter?

Answer 1

`12x+4`

Explanation:

The perimeter is the sum of all the lengths of the sides, so we just need to add.
`3x+7+4x-9+5x+6`
`12x+4`

Answer 2

Let the perimeter be `P`. Then we have:

`P=(3x+7)+(4x-9)+(5x+6)= 12x+4`