Proportions and Ratios in Blends

Proportions and Ratios in Blends

Assessment

Interactive Video

Mathematics

6th - 8th Grade

Hard

Created by

Olivia Brooks

FREE Resource

The video tutorial explains how to solve a problem involving mixing two coffee blends in a specific proportion. It starts by setting up the problem, where a large coffee distributor needs to maintain a secret blend ratio. The tutorial demonstrates how to set up and solve a proportion using ratios, cross-multiplying to find the unknown quantity of the breakfast blend needed. The solution is explained step-by-step, ensuring the correct blend is achieved.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main task described in the introduction of the video?

To find the total weight of coffee blends.

To determine the correct proportion of two coffee blends.

To calculate the cost of coffee blends.

To identify the origin of the coffee beans.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the first ratio set up in the video?

18:60

60:18

40:18

18:40

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is the second ratio set up in the same way as the first?

To use different proportions for different days.

To maintain the same proportion of blends.

To ensure the total weight is the same.

To simplify the calculation.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the unknown variable in the second ratio?

The amount of Rift Valley blend.

The total weight of the blend.

The amount of Breakfast blend.

The cost of the blend.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What mathematical operation is used to solve for the unknown in the proportion?

Cross-multiplication

Subtraction

Addition

Division

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the result of cross-multiplying 60 and X with 18 and 40?

60X = 900

60X = 720

60X = 800

60X = 640

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do you solve for X after cross-multiplying?

Divide both sides by 60.

Multiply both sides by 60.

Subtract 60 from both sides.

Add 60 to both sides.

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