ratios and proportions

Coach J has 30 students in class. 12 are running, 10 are jumping rope and the rest are doing push-ups. What is the ratio of students doing push-ups to students running?

• 2:3
• 8:30
• 12:30
• 8:10

Coach Becker needs to buy new basketballs for gym class. This table shows the total cost of different numbers of basketballs. What is the cost per basketball?

• $5
• $9
• $13
• $27

What is the ratio of red apples to green apples

• 7 apples to 3 green
• 4 red apples to 7 apples
• 4 red apples to 3 green apples
• 3 green apples to 4 red apples

3 cups of flour can make 9 cupcakes,

how many cupcakes can be made with 6 cups of flour?

• 20

• 12

• 18

• 24

Does the table represent a proportional relationship?

• Yes.
• No.

Ibrahim works 40 hours in one week and makes $760. What is his average dollar per hour?

• $20 per hour

• $800 per hour

• $18 per hour

• $19 per hour

Do the ratios form a proportion?

• Yes, they form a proportion.
• No, they do not form a proportion.

Solve the proportion

• 144
• 4
• 6
• 9

$5 is equal to 90 pesos.  How many dollars is 720 pesos?

• $40
• $4
• $400
• $12,960

Solve the proportion.

• k=5
• k=3.3333333
• k=60
• k=90