PLEASE HELP THIS FOR TODAY.

Find the missing lengths of the sides.

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.

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

Arectangle has a width of 5 cm and a length of 10 cm. if the width is increased by 3, how does the perimeter change?