15 minutes to drive 21 miles; 25 minutes to drive 35 miles are the ratios or rate equivalent

How to do this , and can some one explain

Josh has a rewards card for a movie theater he receives 15 points for becoming a rewards card holder he earns 3.5 points for each visit to the movie theater he needs at least 55 points to earn a free movie ticket which inequality can josh use to determine x, the minimum number of visits he needs to earn his first free movie ticket.

What is the factor form of x^2-9x+14