Question: Melissa is repairing her shoes. For each shoe, it takes her 5 minutes to replace the buckle and 10 minutes to even out the heel. How many minutes does Melissa spend on this project total?
Answer: Step-by-step reasoning process: First find the total time Melissa spends per shoe: 5 minutes + 10 minutes = 15 minutes. Then double that amount because there are 2 shoes: 15 minutes * 2 = 30 minutes.
So the answer is 30.

Question: Three times as many children as adults attend a concert on Saturday. An adult ticket costs $7 and a child's ticket costs $3. The theater collected a total of $6,000. How many people bought tickets?
Answer: Step-by-step reasoning process: Let X be the number of adults attending the concert. The number of children attending the concert is 3 * X. The theater collected a total of 7 * X + 3 * (3 * X) = $6,000. Multiplying through the parentheses we get 7X + 9X = $6,000. Adding like terms we get 16X = $6,000. Dividing both sides by 16 we get X = 375, the number of adults attending the concert. The number of children attending the concert is triple this number: 375 adults * 3 children / adult = 1125 children. The number of people attending the concert is 375 + 1125 = 1500 people.
So the answer is 1500.

Question: Kayden's business delivered an equal number of the 400 cartons of milk it had processed to four of its customers in different towns. However, each of the four customers returned 60 cartons damaged during delivery. What's the total number of cartons that were accepted by the customers?
Answer: Step-by-step reasoning process: Each of the four customers received delivery of 400 / 4 = 100 cartons of milk. Since each customer returned 60 cartons that were damaged during delivery, the number of cartons accepted is 100 - 60 = 40 cartons by each customer. If each customer accepted 40 cartons, the total number of cartons that the four customers did not return is 40 * 4 = 160.
So the answer is 160.

Question: Derrick measures the length of his yard. The length of Alex's yard is half the size of Derrick's and the length of Brianne's yard is 6 times the size of Alex's. If Brianne's yard is 30 yards long, how long is Derrick's yard, in yards?
Answer:
Step-by-step reasoning process: The length of Alex's yard is 30 / 6 = 5 yards. The length of Derrick's yard is 5 * 2 = 10 yards.
So the answer is 10.