I need help asap no rocky please show work if not I’ll report

Which of the fallowing best completes the sequence 5,10,15, a) 30 b) 22 c)25 d)35

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.

Can someone explain to me how to do