Return from Winter Break - Unit 3

Write a ratio, in simplest form, from the following sentence: 18 girls to 12 boys

• 18 to 12

• 9 to 6

• 6 to 4

• 3 to 2

4000 marbles in 200 jars. What is the unit rate in simplest terms?

• 40 to 20

• 40 marbles per jar

• 20 marbles per jar

• 2 marbles per jar

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Does the table show a proportional relationship (hint, find the constant of proportionality also known as the unit rate). If yes, identify k.

• Yes, the table shows a proportional relationship. k = 27.5 miles per gallon.

• No, the table does not show a proportional relationship

• Yes, the table shows a proportional relationship. k = 27 miles per gallon.

• Yes, the table shows a proportional relationship. k = 28 miles per gallon.

What simple formula can you use to find the constant of proportionality (unit rate) from any table? Remember, k stands for the constant of proportionality.

• k = y/x

• k = x/y

• k = mx + b

Tags

CCSS.7.RP.A.2B

Solve the proportion.

• k=5

• k=3.3333333

• k=6

• k=4

Write a proportion from the table and solve it.

• c = $1.70

• c = $1.72

• c = $1.73

• c = $1.89

The ratio of pennies to quarters in Michael's piggy bank is 14:3. If there are 51 quarters in the bank, how many pennies does the child Michael have?

• x = 23 pennies

• x = 238 pennies

• x = 248 pennies

• x = 223 pennies

Use the percent proportion or percent equation to solve.

• 73.7

• 71.2

• 78.3

• 60

If you receive 25% off an item costing $22.00, how much money do you save?

• $5.50

• $4.25

• $6.00

• $7.35

What is the total price of a book if Barnes and Nobles gets it for $4.25 and the markup is 30%?

• $55.25

• $5.28

• $5.53

• $4.38