Answer:
https://www.symbolab.com/solver/step-by-step/y%3D-34x%5E%7B2%7D%2B1542x-10037
5x = 120, so
x = 24
angle CAB=37° angle ABC=82°
Step-by-step explanation:
B.
21 X 2 = 42
42-7 = 35
35 + 21 = 56