7.4A Proportions

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply the terms and then solve for the variable.

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.

Front

If Madeline ran 21.7 miles in 7 hours, what is her unit rate?

Back

3.1 miles per hour.

Front

How do you find the cost per item?

Back

Divide the total cost by the number of items.

Front

If a pizza costs $12 and has 8 slices, what is the cost per slice?

Back

$1.50 per slice.

Front

What is the formula to find the expected number of items in a larger package based on a smaller package?

Back

(Number of pieces in small package / Weight of small package) x Weight of large package.

Front

If a 6-ounce package contains 45 pieces, how many pieces are in a 10-ounce package?

Back

75 pieces.

Front

What does 'solving for x' mean in a proportion?

Back

It means finding the value of x that makes the proportion true.

Front

If x/5 = 4/10, what is x?

Back

x = 20.