Olga had more than 6 aces in what percent of tennis matches

1. what is the measure of ∠abc? what is the measure of ∠abd?

How do i do this activity, is appreciated

Need ! the total ticket sales for a high school basketball game were $2,260. the ticket price for students were $2.25 less than the adult ticket price. the number of adult tickets sold was 230, and the number of student tickets sold was 180. what was the price of an adult ticket?