Unit 4: Test Review

Front

What is a mixture in terms of paint?

Back

A mixture in terms of paint refers to combining different colors to create a new shade. For example, mixing red and yellow paint creates orange.

Front

How do you find the amount of one ingredient needed when scaling a recipe?

Back

To find the amount of one ingredient needed when scaling a recipe, use a ratio based on the original amounts. For example, if the original recipe uses 3 teaspoons of red paint for every 7 teaspoons of yellow paint, you can set up a proportion to find the new amount needed.

Front

What is the formula to calculate the total cost of multiple items?

Back

The total cost of multiple items can be calculated by multiplying the weight of each item by its price per pound and then summing all the costs.

Front

How do you calculate the percent of change?

Back

Percent of change is calculated using the formula: ((New Value - Old Value) / Old Value) x 100. For example, if a purse's price changes from $25 to $15, the percent of change is ((15 - 25) / 25) x 100 = -40%.

Front

What is percent error and how is it calculated?

Back

Percent error measures the accuracy of an estimate compared to the actual value. It is calculated using the formula: |(Estimated Value - Actual Value) / Actual Value| x 100.

Front

How do you determine the percentage of a total?

Back

To determine the percentage of a total, divide the part by the whole and multiply by 100. For example, if there are 9 people in a restaurant with a maximum occupancy of 75, the percentage is (9 / 75) x 100 = 12%.

Front

What is a double number line diagram?

Back

A double number line diagram is a visual tool used to represent ratios and proportions. It helps in understanding the relationship between two quantities.

Front

What does it mean to scale a recipe?

Back

Scaling a recipe means adjusting the quantities of ingredients to make more or less of the original recipe while maintaining the same proportions.

Front

How do you convert a fraction to a decimal?

Back

To convert a fraction to a decimal, divide the numerator by the denominator. For example, 1/4 = 0.25.

Front

What is the significance of sales tax in a purchase?

Back

Sales tax is an additional charge added to the price of goods and services, calculated as a percentage of the purchase price.