Question

The side lengths of a triangle are 8x+6, 5x-5, and -6x+12. Write an expression to calculate the perimeter of the triangle. (Note: Perimeter= sum of all side lengths)

Answer 1

7x + 13

Explanation:

P = sum of lengths of the three sides of the triangle:

8x + 6

5x - 5

-6x + 12

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7x + 13 is the perimeter.

Answer 2

just sum them all,

(8x+6)+(5x-5)+(-6x+12) = 7x+13