64 over 81= 8 over 9 what is the exponent

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

Ann and betty together have $60 ann has $9 more than twice betty’s amount how much money dose each have