Answer:
D
Step-by-step explanation:
The segment inside the triangle is an angle bisector and divides the opposite side into segments that are proportional to the other 2 sides, that is
[tex]\frac{x}{7}[/tex] = [tex]\frac{15}{14}[/tex] ( cross- multiply )
14x = 105 ( divide both sides by 14 )
x = 7.5 → D
