Answer:
(A) 10°
Explanation:
You want the measures of the marked angles in the figure showing vertical angles marked (4x-8)° and (2x+1)°.
Vertical angles
The angles marked are vertical angles, which means they are congruent.
4x -8 = 2x +1
2x -8 = 1 . . . . . . . . subtract 2x
2x +1 = 10 . . . . . . . add 9
The angle measures are 10°, choice A.
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