6th math winter exam review :)

Front

What is the total cost of 6 books if each book costs the same amount and the total is $45.00?

Back

Each book costs $7.50.

Front

What is the ratio of blue paint to yellow paint if 5 gallons of blue paint is mixed with 9 gallons of yellow paint?

Back

The ratio is 5:9.

Front

If a model classroom uses a scale of 2 inches:3 feet, how do you find the length of the model if the actual classroom is 30 feet?

Back

Use the proportion 2/3 = x/30.

Front

What is the equivalent expression for 3(x + 6)?

Back

3x + 18.

Front

In the equations y = 3x and y = x + 3, how is y related to x?

Back

In y = 3x, y is 3 times x; in y = x + 3, y is 3 more than x.

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division.

Front

How do you calculate the total cost of multiple items?

Back

Multiply the number of items by the cost per item.

Front

What does it mean to simplify an expression?

Back

To simplify an expression means to reduce it to its simplest form.

Front

What is a proportion?

Back

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

Front

How do you solve for x in an equation?

Back

Isolate x on one side of the equation using inverse operations.