Unit 2 Mid-Unit Test Study Guide

Which ratio is equivalent to 2:5? Select all that apply.

• 20:50

• 10:25

• 5:2

• 4:10

What is the ratio 800:200 equivalent to?

• 4:1

• 1:4

• 2:1

• 1:2

What is the ratio 3:2 equivalent to?

• 60:40

• 40:60

• 2:3

• 1:2

What is the ratio 2:1 equivalent to?

• 100:50

• 50:100

• 1:2

• 3:2

What is the ratio 30:20 equivalent to?

• 3:2

• 2:3

• 1:2

• 2:1

What are the missing numbers?

A recipe calls for 1/3 cup of lime juice for every 5 cups of orange juice. How much lime juice do you need for 20 cups of orange juice?

• 1 and 1/3 cups

• 4 cups

• 2 cups

• 1 and 1/2 cups

Each of these is a pair of equivalent ratios.

For each pair, explain why they are equivalent ratios or draw a diagram that shows why they are equivalent ratios.

a. 4:5 and 8:10

Explain why 6:4 and 18:8 are or are not equivalent ratios.

• 6:4 is not equivalent to 18:8 because they are different numbers.

• 6:4 is not equivalent to 18:8 because 18 is 6⋅3, but 8 is not 4⋅3.

• 6:4 is equivalent to 18:8 because both can be multiplied by 3

• 6:4 is equivalent to 18:8 because they both simplify to 3:2

A recipe calls for 9/5 tablespoons of powder mix for every 15 ounces of water. How many batches can you make with 9 tablespoons of mix and 75 ounces of water?