Answer:
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Answer: Number 1
Step-by-step explanation:
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Answer:
angle AOD + 170=180 (sum of angles on a straight line)
angle AOD=180-170
angle AOD=10
Angle BOC(4x)+ 170= 180 (sum of angles on a straight line )
angle BOC(4x) =180-170
4x=10
4x/4=10/4
x=2.5
