Can anyone solve this?

Abcd is a square. what is the measure of angle bac

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?

Need plz been trying to do it for a long time and still haven’t succeeded