Jos has read 140 pages of his 300 page book what percent of the book has he read?

What is the prime factorization of 195

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.

How do you solving the solution of each system using elimination?