Answer:
B. 40
Step-by-step explanation:
to solve this, we must know that the interior angles of triangle has a total sum of 180 degrees
first, we can subtract 50 from 180 which is 130. 130 represents the missing degrees in the two other angles.
next. we can set up the equation 2y+y+10=130 to solve for y.
2y+y+10=130
3y+10=130
3y=120
y=40
hope this helped! :))
