09.31 Kat is painting the edge of a triangular stage prop with reflective orange paint. The lengths of the edges of the triangle are (3x - 4) feet, (x2 - 1) feet, and (2x4 – 15) feet. What is the perimeter of the triangle if x = 4? 16 feet 40 feet 76 feet 80 feet Answer : 40 feet