CBP Flashcard Reveiw

Front

What is a ratio?

Back

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

Front

If there are 5 boys for every 7 girls in a class, how do you find the number of boys if you know the number of girls?

Back

Use the ratio to set up a proportion. If there are 35 girls, set up the equation: 5/7 = x/35, where x is the number of boys. Solve for x to find that there are 25 boys.

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 speed?

Back

Speed is calculated by dividing the distance traveled by the time taken. The formula is: Speed = Distance / Time.

Front

If a car travels 124 miles in 2 hours, what is its speed in miles per hour?

Back

The speed is 62 miles per hour, calculated as 124 miles / 2 hours.

Front

What is the relationship between tenants and cars if the ratio is 3:5?

Back

For every 3 tenants, there are 5 cars. If there are 30 tenants, you can find the number of cars by setting up a proportion: 3/5 = 30/x.

Front

How do you represent a ratio in fraction form?

Back

A ratio can be represented as a fraction by placing the first quantity over the second quantity. For example, a ratio of 4:5 can be written as 4/5.

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities when they are combined together, expressed as a quantity of one. For example, if 5 apples cost $10, the unit rate is $2 per apple.

Front

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

Back

To check if two ratios a/b and c/d are equivalent, cross-multiply: a*d and b*c. If the products are equal, the ratios are equivalent.

Front

What is the cost of 10 erasers if each eraser costs 5 cents?

Back

The cost of 10 erasers is 50 cents, calculated as 10 erasers * 5 cents each.