At the gym club there are 5 males for every 3 females. the total attendance at the gym last week was 520. how many were males?

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50. write an inequality to determine the number of chores, c, janie could do to have enough money to buy the cd.