A. Always
Two lines don't always intersect, but the solutions are always where they intersect.
Lets x = missing angle
x = 180 - (60+80)
x = 180 - 140
x = 40
answer
40
.45 * 120 = 54
.072 * 54 = 3.888
54 + 3.888 = 57.888= $57.89
Answer: The answer is C 90
Step-by-step explanation: Rotations is ¼ and the Radians is π/2