Recognising and representing proportional relationships between quantities

A model airplane is made to the scale 1 inch to 24 inches. If the wing of the actual plane is 18 feet long, how long will the model wing be in inches?

Tags

CCSS.7.RP.A.2C

What is B?

• 28
• 70
• 49
• 56

Tags

CCSS.7.RP.A.2C

Select the equation that matches: Last night, the two dinner specials at Owen's favorite restaurant were salmon filet and steak. The restaurant served 33 salmon filets, which was 44% of all the specials sold. How many specials did the restaurant serve?

• .44 x w = 33

• .33 x 44 = w

• .33 x w = 44

• .44 x 33 = w

Tags

CCSS.7.RP.A.2C

Solve this proportion for x.

• 81

• 90

• 63

• 72

Tags

CCSS.7.RP.A.2C

A proportional relationship can be written as an equation in the form ____ = _____  _____

• y = k+x
• y = k-x
• y = kx
• y = k/x

Tags

CCSS.7.RP.A.2C

Write a percent proportion and solve each problem. 450 is 75% of what number?

Tags

CCSS.7.RP.A.2C

John is a postman who delivers 60 letters every hour. If he continues at this rate, which equation best represents y, the total number of letters John delivers in x hours?

• A. x = y + 60

• B. y = x + 60

• C. X= 60y

• D. y = 60x

Tags

CCSS.7.RP.A.2C

What equation should you use when writing an equation for a proportional relationship?

• y = x + k

• y = kx

• x = yk

• x = ky

Tags

CCSS.7.RP.A.2C

Write a division equation to represent this equation. Duncan typed 3,528 words in 21 minutes. Let w represent the words typed each minute.

• 21w = 3,528

• 3,528/21=w

• 3,528/w=21

Tags

CCSS.7.RP.A.2C

Mika can eat 21 hot doges in 66 minutes. How many minutes will it take her to eat 35 hot dogs? Set up the proportion.

Tags

CCSS.7.RP.A.2C