8) Two lines intersect as shown.
(2x + 20)
60°
What is the value of x?
A 20
B 40
C 50
D60

Answer:
A. 20
Step-by-step explanation:
Vertical angles are congruent, so ...
2x +20 = 60
x +10 = 30 . . . . . divide by 2
x = 20 . . . . . . . . .subtract 10