Expressions in the Real World

Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operators (such as +, -, *, /) that represents a value.

Front

What does it mean for a length to be twice as long as a width?

Back

If the width is represented by 'w', then the length can be expressed as '2w', meaning it is two times the width.

Front

How do you calculate the area of a rectangle?

Back

The area of a rectangle is calculated by multiplying its length by its width (Area = length × width).

Front

If Jonathan has $450 and adds $20 per week, how can we express his total savings after 'w' weeks?

Back

His total savings can be expressed as 450 + 20w.

Front

What is the total cost of renting a skating rink for 'n' people if it costs $100 plus $8 per person?

Back

The total cost can be expressed as 8n + 100.

Front

How do you express a situation where one quantity is more than another?

Back

If one quantity is more than another by a certain amount, you can express it as 'quantity + amount'.

Front

What does 'e' represent in the context of Allison and Emily's cookie sales?

Back

In this context, 'e' represents the number of boxes of cookies sold by Emily.

Front

How do you express a temperature that is colder than another temperature?

Back

If today's temperature is colder than yesterday's by a certain amount, you can express it as 'yesterday's temperature - amount'.

Front

What is the formula for calculating total cost when there is a fixed cost and a variable cost?

Back

Total cost = fixed cost + (variable cost per unit × number of units).

Front

If 'y' represents yesterday's temperature, how do you express today's temperature if it is 10 degrees colder than twice yesterday's?

Back

Today's temperature can be expressed as 2y - 10.