Which of the following is another name for a proof by contradiction?
o a venn diagram
o b. two-column proof
o c. indirect proof
o d. qed

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.