Answer:
Angle B is 52 degrees
Step-by-step explanation:
The outer angle 112 adds up with the inner angle to make 180. So angle C is 68. All the angles should add up to 180, so add them all together.
68+4y+3y+7 = 180
75+7y = 180
7y = 105
y = 15
To double-check this, plug 15 into y and add up all the angles, it should add up to 180.
3(15)+7 = 52
4(15) = 60
68+60+52 = 180
