Chapter 5.4 - Write and Solve Proportions

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Tags

CCSS.7.RP.A.2A

Front

How do you determine if two ratios form a proportion?

Back

Cross-multiply the ratios. If the products are equal, the ratios form a proportion.

Tags

CCSS.7.RP.A.2A

Front

What is the formula for solving a proportion?

Back

Tags

CCSS.7.RP.A.2A

Front

If Allison can sew 3 scarves in 75 minutes, how many scarves can she sew in 4 hours?

Back

9 scarves.

Tags

CCSS.6.RP.A.3B

Front

What is the ratio of hot dogs to hamburgers sold if 272 hot dogs were sold and the ratio is 8:3?

Back

102 hamburgers.

Front

What is the missing value in the proportional relationship if the table shows a = 18?

Back

The missing value is a = 18.

Tags

CCSS.7.RP.A.2B

Front

Back

x = 3.7.

Tags

CCSS.7.RP.A.3

Front

What does it mean if two quantities are in a proportional relationship?

Back

It means that as one quantity increases or decreases, the other quantity changes at a constant rate.

Tags

CCSS.7.RP.A.2A

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How can you express a ratio in simplest form?

Back

Divide both terms of the ratio by their greatest common factor.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2