This recipe makes 4 portions of potato soup. Richard follows the recipe but wants to make 12 portions.
Complete the amounts of each ingredient that he needs.

Recipe: Serves 4
40 mL oil
50 g onions
400 g potatoes
500 mL milk

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.