Question

I need help on this problem please!!

Answer 1

Explanation:

angle C=180-111=69 degrees

The angles of a triangle must sum to 180 degrees so

3y+6+4y+69=180

7y+75=180

7y=105

y=15, since angle B=3y+6

B=3(15)+6

B=45+6

B=51 degrees