8th Solving 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 does it mean if two ratios do not form a proportion?

Back

It means that the two ratios are not equivalent and do not represent the same relationship.

Front

If 24 loaves of bread cost $48.00, what is the cost of 1 loaf?

Back

$2.00

Front

If 10 loaves of bread cost $20.00, how much would 5 loaves cost?

Back

$10.00

Front

What is the cross-multiplication method?

Back

Cross-multiplication involves multiplying the numerator of one ratio by the denominator of the other ratio.

Front

Solve for x: 3/4 = x/12

Back

x = 9

Front

What is the first step in solving the equation 5x = 20?

Back

Divide both sides by 5 to isolate x.

Front

If a/b = c/d, what is the value of ad?

Back

ad = bc, which shows the relationship between the cross products.

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 per one unit.