Find a single expression that represents the area of the outer ring of the circle if the area of the whole circle is represented by the expression "25x^2 − 12x − 9."
inner circle- 7x^2-3

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?