3. If the measure of angle 4 is 6x + 20 and the meas-
ure of angle 7 is 10x - 40, what is the measure of
angle 6?
a. 60°
b. 70°
c. 110°
d. 116°
e. 120°

E

Step-by-step explanation:

If you add all the number together then you will get yourself to 120

468

step-by-step explanation:

option 3 . (5x + 1) - (-10x + 6)

step-by-step explanation:

option 1 :

(4x + 3) + (-9x + 4)

or 4x+3 -9x + 4

or -5x + 7

option 2

(x - 2) - (6x - 9)

or x-2-6x + 9

or -5x + 7

option 3

(5x+ + 6)

or 5x + 1 + 10x -6

or 15x -5

option 4

-4x+2x+7-3x

-7x + 2x + 7

-5x + 7

hence only option 3 did   not satisfy the given simplify expression.