7.1 Group Work (Ratio and Proportion)

Front

What is a ratio?

Back

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

Front

How do you write a proportion?

Back

A proportion is an equation that states that two ratios are equal, typically written as a/b = c/d.

Front

If the ratio of dogs to cats is 5:3 and there are 25 dogs, how many cats are there?

Back

15 cats.

Front

What is the formula to find the missing value in a proportion?

Back

If a/b = c/d, then cross-multiply to find ad = bc.

Front

In a recipe, if you have 1.5 cups of milk for every 3 cups of flour, what is the ratio of milk to flour?

Back

The ratio of milk to flour is 1:2.

Front

If Seth used 5 cups of flour instead of 3, how much milk should he use to maintain the same ratio?

Back

2.5 cups of milk.

Front

What is the perimeter of a rectangle if the length is 6 ft and the width is 5 ft?

Back

The perimeter is 22 ft.

Front

If the perimeter of a bedroom is 88 feet and the ratio of width to length is 5:6, what are the dimensions?

Back

20 ft x 24 ft.

Front

What does it mean to solve for x in an equation?

Back

To solve for x means to find the value of x that makes the equation true.

Front

If k/3 = 5, what is the value of k?

Back

k = 15.