Solving Real-Life Problems: Substitute Values and Unknowns

A school is planning a field trip. The cost per student is $15, and the total cost for the trip is $300. How many students are going on the trip?

• 20

• 25

• 15

• 30

Maria has twice as many apples as John. If together they have 36 apples, how many apples does each person have?

• John has 12 apples and Maria has 24 apples.

• John has 18 apples and Maria has 18 apples.

• John has 10 apples and Maria has 26 apples.

• John has 15 apples and Maria has 21 apples.

A car rental company charges a flat fee of $50 plus $0.20 per mile driven. If a customer paid $70, how many miles did they drive?

• 150 miles

• 200 miles

• 100 miles

• 50 miles

In a fruit basket, there are oranges and bananas. If there are 3 times as many bananas as oranges and the total number of fruits is 40, how many of each type of fruit are there?

• 10 oranges and 30 bananas

• 15 oranges and 25 bananas

• 20 oranges and 20 bananas

• 5 oranges and 35 bananas

A bookstore sells novels for $12 each and textbooks for $20 each. If a customer buys a total of 10 books for $150, how many of each type did they buy?

• 7 novels and 3 textbooks

• 5 novels and 5 textbooks

• 4 novels and 6 textbooks

• 6 novels and 4 textbooks

A gardener is planting flowers and shrubs. If the number of flowers is 4 more than twice the number of shrubs and there are 28 plants in total, how many flowers and shrubs are there?

• 10 flowers and 18 shrubs

• 20 flowers and 8 shrubs

• 15 flowers and 13 shrubs

• 25 flowers and 3 shrubs

Two friends, Alex and Jamie, are saving money for a concert. Alex has $20 more than Jamie, and together they have $120. How much does each friend have?

• Alex has $50, Jamie has $70.

• Alex has $80, Jamie has $40.

• Alex has $70, Jamie has $50.

• Alex has $60, Jamie has $60.

A recipe requires 2 cups of flour and 3 cups of sugar. If you want to make a batch that uses 12 cups of flour, how much sugar will you need?

• 10 cups of sugar

• 15 cups of sugar

• 18 cups of sugar

• 12 cups of sugar

A theater has two types of tickets: adult tickets for $10 and child tickets for $5. If 100 tickets were sold for a total of $800, how many adult and child tickets were sold?

• 70 adult tickets and 30 child tickets

• 50 adult tickets and 50 child tickets

• 80 adult tickets and 20 child tickets

• 60 adult tickets and 40 child tickets

In a class, the ratio of boys to girls is 3:2. If there are 30 students in total, how many boys and girls are there?

• Boys: 12, Girls: 18

• Boys: 20, Girls: 10

• Boys: 15, Girls: 15

• Boys: 18, Girls: 12