Refunds, Costs, and Quantities

This video tutorial covers various mathematical problems involving multiplication and division. It includes examples such as calculating the number of apples in bags, refunds for returned cans, subway fare costs, and pendulum cycles. The lesson emphasizes understanding relationships between quantities and using mathematical expressions to solve real-world problems.

If one bag contains 3 apples, how many apples are in 4 bags?

• 12

• 15

• 9

• 18

What is the expression for the number of apples in b bags?

• b - 3

• b/3

• 3b

• b + 3

If there are 600 apples, how many bags are needed?

• 100

• 150

• 200

• 250

How much is the refund for returning one can in dollars?

• $1.00

• $0.05

• $0.10

• $0.50

What is the expression for the refund amount for c cans?

• 0.05c

• c + 0.05

• c/5

• 5c

How much does 3 subway rides cost?

• $10.00

• $7.50

• $12.50

• $5.00

If a commuter spends $175, how many trips did they take?

• 50

• 60

• 70

• 80

How many cycles does a pendulum swing in 60 seconds?

• 72

• 60

• 48

• 36