Rates Proportions and Applications

Two out of every 3 students in Mr. Lopez' ninth grade class recycle aluminum cans. If 48 students recycle aluminum cans, how many students are in Mr. Lopez’s class?

• 72

• 24

• 144

• 96

• 5

Tags

CCSS.6.RP.A.3B

A car that sold for $11,900 has a sales tax of $767. What is the cost of a car, to the nearest dollar, if its sales tax is $637?

• $12048

• $6544

• $9883

• $14328

• $14323

Tags

CCSS.7.RP.A.3

The ratio of history books to fiction books is 3 to 5. If there are 12 history books, how many fiction books are there?

• 7

• 20

• 12

• 18

• 24

A sailor is allowed 7 days off for every 30 days at sea. For 28 days off, how many days at sea must a sailor spend?

• 40

• 6

• 160

• 120

• 200

Tags

CCSS.7.RP.A.3

Cindy’s job is to check computer printers for defects. Out of 420 printers she has to check, only 3 of the first 84 have been defective. Using this information, what is the best prediction of the total number of printers in this group that will be defective?

• 15

• 12

• 6

• 18

• 24

A photocopy machine copied 500 pages in 1.5 hours. At this rate, how long will the machine take to copy 375 pages?

• 1.125

• 2.5

• 3

• 2

• 0.825

Tags

CCSS.6.RP.A.3B

The scale of a model of the Stanton Street Bridge is 1 inch : 50 feet. If the model is 15 inches tall, what is the actual height of the bridge?

• 1250

• 750

• 3.33

• 15

• 500

Tags

CCSS.6.RP.A.3B

On a map, two towns are 2.4 inches apart. The actual distance between the towns is 36 miles. What is the scale of the map?

• 1 : 12

• 1 : 6

• 1 : 8

• 1 : 15

• 2 : 3

Tags

CCSS.7.RP.A.2C

You purchase a model airplane. The model states that the scale is 1 inch : 9.35 feet. If the actual plane is 150 feet long, what is the length of the model?

• 21

• 14.5

• 15.2

• 16

• 18

Tags

CCSS.6.RP.A.3B

In 2018, the exchange rate of Mexican Pesos for a US Dollar was 20.25 to 1. If a cab ride cost 150 pesos, what is the cost in US Dollars?

• $7.41

• $ 3037.50

• $0.135

• $8.75

• $30.37

Tags

CCSS.6.RP.A.3B