HELP PLEASE!! Please don't give me sites or links, those won't work since the site is blocked

What are the domain and range of f(x)=[1/5]x

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.

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b