I think you used the wrong subject.
your answer is B though.
Answer: 90°
Step-by-step explanation:
Angle b is vertical to the angle that has a measure of 90°
75 divided by 15 equals 5 so each mouse cost $5.
15%=3
5%=1
5(20)=100
1(20)=20
So, there are 20 students in the class.
