How do I explain how 5 yards in feet is 15 feet?

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.

If you answer 2+2 you will get over 80 points

2. explain in words how you plot the point (4, −2) in a rectangular coordinate system.