Answer:
i think the best estimate is answer b
Step-by-step explanation:
x < 21
x - 5 < 16
x < 21 Add 5 to both sides
what desk
x = 15, 72 degrees
4x + 12 + 108 = 180
4x + 120 = 180
4x (+ 120 - 120) = 180 - 120
4x = 60
4x/4 = 60/4
x = 15
4x + 12
4(15) + 12
60 + 12
72 degrees
