$970 at 4 1/4% simple interest for 2 years

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.

Landon wrote that 3−2.6=4. which statement about his answer is true?

What are the excluded values? m+5/mn+3m