Answer:
y=110 degrees
Step-by-step explanation:
background info------
sum of the interior angles of a triangle is always 180 degrees.
angle of a straight line is always 180 degrees.
-------
you see that x and y add up to 180 degrees
also 30+80+x is 180 cause they are in a triangle
set up equations:
30+80+x=180
x+y=180
----- solve
30+80+x=180
110+x=180
x=70
x+y=180
(70)+y=180
y=110 degrees
