Question

Kat is painting the edge of a triangular stage prop with reflective orange paint the letters of the lengths of the edges of the triangle are (3x-4) feet (x2 -1) feet and (2x2 -15) feet what is the perimeter of the triangle if x =4

Answer 1

perimeter = 40 feet

the perimeter is the sum of the lengths of the sides

evaluating each side for x = 4

3x - 4 = (3 × 4) - 4 = 12 - 4 = 8

x² - 1 = 4² - 1 = 16 - 1 = 15

2x² - 15 = 2(4)² - 15 = 32 - 15 = 17

the sides have lengths of 8, 15 and 17

perimeter = 8 + 15 + 17 = 40 feet