Anwser 52 degrees
Step-by-step explanation:
first you figure out the 2 angles the triangle is missing so 28-90 would be 62
then to find the other unknown angle you solver for the larger triangle
so 90+48=138
180-138=42
42+62=104
104+2y-30=180
add 30
104+2y=210
-104
2y=106
divide by 2
y=53
