16-01-2019
Mathematics

contestada

which one could be the answer A
B
C
D

which one could be the answer A B C D class=

Respuesta :

16-01-2019

Answer:

b.

Step-by-step explanation:

angle AOC = angle BOC + angle AOB

thus

85 = (2x + 10) + (4x - 15)

85 = 6x - 5

x = 15

angle BOC = 2x + 10 = 40

angle AOB = 4x - 15 = 45

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