Answer:
A. 25°
Step-by-step explanation:
The angles on either side of the bisector are congruent, so ...
(3x -5)° = (x +15)°
2x = 20 . . . . . . . . . . . . divide by °; add 5-x
x = 10 . . . . . . . . . . . . . .divide by 2
Substitute this result into the expression for the angle measure:
m∠BAC = (3·10 -5)° = 25°
