if a system of linear equations has infinitely many solutions, what does this mean about the two lines?

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.

9/10 divide by -3/15 as a mixed number

Factor the expression using the gcf. the expression 21m−49n factored using the gcf