Kat is painting the edge of a triangular stage prop with reflective orange paint. The lengths of the edges of the triangle are
(
3
x
−
4
)
feet,
(
x
2
−
1
)
feet, and
(
2
x
2
−
15
)
feet.

What is the perimeter of the triangle if
x
=
4
?

Responses

16
feet
16 feet

40
feet
40 feet

76
feet
76 feet

80
feet