Answer:
B
Step-by-step explanation:
Since /AOC = /BOC + /AOB, you fill in the numbers -
85 = 2x + 10 + 4x - 15
Then you combine like terms -
85 = 6x - 5
Then you add 5 to both sides -
90 = 6x
Then you divide by 6 -
15 = x
Then you substitute the x in the angles -
/BOC = 2(15) +10
/AOB = 4(15) - 15
Simplify the numbers and you get -
/BOC = 40
/AOB = 45
