Is this correct please help me quick

Which of the following is most likely the next step in the series? a3z, b6y, c9x, d12w, е15v, f18u

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

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?