What is the answer to -x - ( -1.2x - 6.9)=10 + 2 (0.3x-10)

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.

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*

Which of the following equations is equivalent to x/3-6/x=1