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Ratios and proportions

| 11 Questions

1

1 pt

Susan found a bag of 20 golf balls at a garage sale, and bought the bag for 75 cents. Express the ratio of cost to number of balls in lowest terms.

20:75

75:20

4:15

15:4

2

1 pt

A statckable CD rack holds 25 CDs and costs $4. Charlie has a collection of 150 CDs. How much will it cost him to buy enough racks to hold all of his CDs?

$4

$24

$25

$150

3

1 pt

A gardening magazine suggested that a good mix for a flower bed is 20 pails of clay dirt, 15 pails of sand, and 5 pails of manure. Express this in lowest terms.

20:15:5

10:7:3

4:3:1

4:3:2

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4

1 pt

Solve the proportion.

5

1 pt

You can peel 4 potatoes in 10 minutes. How long will it take you to peel 14 potatoes?

6

1 pt

What is the unit rate for number 5?

7

1 pt

The ratio of girls to boys in the 6th grade is 6 to 7. How many girls are there if there are 364 total students?

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8

1 pt

Using the table, what is the ratio of 7th grade boys to 6th grade boys in simplest form?

30:26

13:15

17:11

15:13

9

1 pt

A 64-ounce container of sports juice costs $6.50. A 48-ounce container of the same juice costs $4.25. Which size container is the better buy?

64 oz for $6.50

48 oz for $4.25

10

1 pt

Ms. Young's tahoe gets 78 miles per 3 gallons. What's the unit rate for her mileage?

78 miles per gallon

234 miles per gallon

0.038 miles per gallon

26 miles per gallon

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11

1 pt

Choose ALL answer choices equivalent to the ratio of snails to frogs?

4:3

3:4

9:12

12:9

18:20

27:36

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