Find the length of leg "a", if leg "b"= 12 and the hypotenuse "c" is 25. Round to the nearest tenth

The depreciation per unit for a company

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.

Can someone me out here and the tell me the greatest common factor