Answer:
D
Step-by-step explanation:
180 degrees in a triangle
102+(x+6)+(x+15)=180
remove parenthesis and combine like terms
123+2x=180
subtract 123 from both sides
2x=57
divide
x=28.5
substitute x for its actual value
28.5+6
angle A= 34.5
28.5+15
angle B= 43.5
