Final Exam

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing how many times one value contains or is contained within the other.

Front

How do you find the cost of multiple items using a ratio?

Back

To find the cost of multiple items, set up a ratio based on the known cost and quantity, then use cross-multiplication to solve for the unknown.

Front

What does it mean for two ratios to be equivalent?

Back

Two ratios are equivalent if they represent the same relationship between quantities, meaning they simplify to the same fraction.

Front

How do you calculate a percentage of a number?

Back

To calculate a percentage of a number, multiply the number by the percentage (in decimal form). For example, 35% of 160 is 0.35 * 160 = 56.

Front

What is the best way to compare prices of different quantities?

Back

To compare prices, calculate the unit price (price per item) for each option and choose the one with the lowest unit price.

Front

If 22 bottles of water cost $4, what is the cost of 1 bottle?

Back

The cost of 1 bottle is $4 ÷ 22 = $0.18 (approximately).

Front

What is a ratio table?

Back

A ratio table is a tool used to organize and compare ratios, showing equivalent ratios in a structured format.

Front

How do you determine if two ratios are equivalent using cross-multiplication?

Back

To determine if two ratios a:b and c:d are equivalent, cross-multiply: if a*d = b*c, then the ratios are equivalent.

Front

What is the formula to find the total cost of items?

Back

Total Cost = Number of Items × Cost per Item.

Front

How do you find the missing value in a ratio table?

Back

To find a missing value, use the known ratios to set up a proportion and solve for the unknown.