Answer:
34
Step-by-step explanation:
All angles of a triangle add up to 180 degrees so you would subtract from 180 with the angles you already have to get your answer. 180 - 115 - 31 = B which is 34.
A is the answer i believe
First find slope
(-2-6)/(9-5) = -8/4 = -2
Y = -2x + b
6 = -2(5) + b, b = 16
Solution: D