In the given polygon , BO = 7x + 4, OD = 18 find x

Umm.. just started this 2day and its not on my notes(p′︵‵。)

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?

The track team ran a mile and a quarter during their practice how many kilometers did her team runs?