10 points and brainliest! explain how you know!

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?

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

For the inequality |c| < |d| to be true, which of the following must be true?