Answer:
(C) y = 115
Step-by-step explanation:
First, we can solve for x using our knowledge that same-side exterior angles are supplementary:
(3x + 20) + (5x + 40) = 180
8x + 60 = 180
8x = 120
x = 15
Next, we can solve for y using our knowledge that alternate exterior angles are congruent:
5x + 40 = y
↓ plugging in x = 15
5(15) + 40 = y
75 + 40 = y
(C) y = 115
