Answer:
Step-by-step explanation:
perimeter of a rectangle = twice the length plus twice the width
P = 2L + 2W equation 1 P = 86 ft
Given the length is seven feet more than the width
L = W + 7 equation 2
Substitute equation 2 into equation 1
P = 2(W+7) + 2W = 86 ft
2W +14 + 2W = 86 ft
4W = 86 - 14
W = 72 / 4
W = 18 feet
∠T + ∠S = 180°
(43+3x) + (45x-7) = 180°
48x+36 = 180
x = 3
∠C = ∠T = 43+3x = 52°
subtract 1 then divide 2
8
21-13=8
m=8
Answer: D is the Answer