Question

The measures of the sides of a triangle are 2x + 3, 8x – 4, and . Write an expression that describes the perimeter of the triangle.

Answer 1

C

Explanation:

Perimeter of a triangle is the sum of all the sides.

A triangle has 3 sides, so if we add up all the 3 sides lengths (given as expressions here) of the triangle, we will have the perimeter.

Perimeter =
`(2x+3)+(8x-4)+(x^2)\\=2x+3+8x-4+x^2`

Now combining like terms we have:

`2x+3+8x-4+x^2\\=x^2+10x-1`

Answer choice C is the correct one.