Question

The length of the edges of the triangle are (3x-4) feet, (x2-1)feet, and (2x-15) feet. What's is the perimeter of the triangle if x=4

Answer 1

40 feet

Explanation:

The perimeter of a triangle is the distance around the triangle. It can be found by adding all the sides together. First, find the amount each side is by substituting x = 4 and simplifying.

3x - 4 = 3(4) - 4 = 12 - 4 = 8

x² -1 = (4)² - 1 = 16 - 1 = 15

2x² - 15 = 2(4)² - 15 = 32 - 15 = 17

Add the sides together, 8 + 15 + 17 = 40 feet