For a regular 30-sided polygon, what is the degree of rotation

Show algebraically that f and g are inverse functions f(x)=x^2/-6; g(x)=square root of 2x+12

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.

Find two numbers if their sum is 91 and the ratio is 6: 7?