The cost of pencils, C, varies directly as the number of boxes, B, purchased. If 4 boxes cost $10.68, then how much will 9 boxes of pencils cost?

Apatient is to take 60 mg of an antibiotic on day 1, take 45mg on days 2 and 3, take 30mg on days 4 and 5 and take 15 mg on days 6 and 7. how many total mg will the patient take?

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

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.