How can I answer this question?

Answer:
155⁰
Step-by-step explanation:
total angle in a triangle = 180
120 +35 =155
180-155=25
streight line =180⁰
180-25=155⁰
Answer:
y=155
Step-by-step explanation:
Triangle = 180°
180°-120°-35° = 25°
Line = 180° - 25°
= 155°