Answer:
B. 59°
Explanation:
<AOC=77°
<BOC=?
THEREFORE,
<AOC=<BOC+<AOB
77° =7x+17+3x
77°-17=7x+3x
60=10x
x=60/10
x=6°
Now,
<BOC=7x+17
=7*6+17
=42+17
=59
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