Answer:
The answer is option A.
55°
Step-by-step explanation:
Angles in a triangle add up to 180°
To find y add up all the angles and equate them to 180°
That's
y + 40 + y + 30 = 180
2y = 180 - 70
2y = 110
Divide both sides by 2
y = 55°
Hope this helps you
