Question: Annie spends 2 hours a week on chess club, 8 hours a week on drama club, and 3 hours a week on glee club. If there are 12 weeks in each semester and Annie takes the first two weeks off sick, how many hours of extracurriculars does she do before midterms?
Answer: First find the total number of extracurricular hours Annie does per week: 2 hours / week + 8 hours / week + 3 hours / week = 13 hours / week. Then find the number of weeks in a semester before midterms by dividing the total number of weeks by 2: 12 weeks / semester / 2 = 6 weeks / semester. Then find the number of weeks before midterms that Annie wasn't sick: 6 weeks - 2 weeks = 4 weeks. Then multiply Annie's weekly commitment by the number of weeks to find her total number of extracurricular hours: 13 hours / week * 4 weeks = 52 hours. The answer is 52.

Question: Libby has 160 quarters in her piggy bank. She has to pay $35 to replace her sister’s dress that she borrowed and ruined. After replacing the dress, how many quarters will Libby have left?
Answer: There are 4 quarters in every dollar, so $35 x 4 = 140 quarters. Libby has 160 quarters – 140 quarters to repay her sister = 20 quarters left. The answer is 20.

Question: It takes 2.5 hours to groom a dog and 0.5 hours to groom a cat. What is the number of minutes it takes to groom 5 dogs and 3 cats?
Answer: 2.5 * 5 = 12.5 hours. 0.5 * 3 = 1.5 hours. 12.5 + 1.5 hours = 14 hours. 14 hours = 14 * 60 = 840 minutes. It would take 840 minutes to groom 5 dogs and 3 cats. The answer is 840.

Question: Mary bought 5 boxes of drinks at $6 each box and 10 boxes of pizzas at $14 each box for her pizza party. She paid $200 for all the items. How much change did she get back?
Answer:
Mary spent 5 x $6 = $30 on drinks. She spent 10 x $14 = $140 on pizzas. She spent a total amount of $30 + $140 = $170. Therefore, Mary got a change of $200 - $170 = $30 after paying all the items for her pizza party. The answer is 30.