The price of a stock steadily decreased by a total of $127 over 15 months. Which expression shows the change in the stock’s value per month

Solve for x, y, and z. show all steps.

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.

Solve 3x-18=2y and 5x-6y=6 by elimination show work