Can someone me with 10-14. its algebra hw and i dont understand

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

Last year, a state university received 3,560 applications from boys. of those applications, 35 percent were from boys who lived in other states. part a)how many applications did the university receive from boys who lived in other states? part b)applications to the university from boys represented 40percent of all applications. how many applications did the university receive in all? i don't how to do part b so me and plz tell how you got your answer

The only way to identify an intercept is as an ordered pair. true false