C. -2a - 4x
Step-by-step explanation:
-7a + 5a= -2a
2x - 6x= -4x
3x + 18 = 147°
step-by-step explanation:
3x + 18 = 147°, because the value of the central angle is equal to the value of the arc formed by it.
i hope i you.
i can't read the graph