Writing Expressions from Word Problems

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

How do you write an expression for a total cost?

Back

To write an expression for total cost, you can use the formula: Total Cost = Fixed Cost + (Variable Cost per Item * Number of Items).

Front

What does 'x' typically represent in algebraic expressions?

Back

In algebra, 'x' is often used as a variable to represent an unknown quantity.

Front

How do you represent 'fewer than' in an expression?

Back

'Fewer than' is represented by subtraction. For example, if Ben has 'x' dollars and Cam has 7 fewer dollars, the expression is: x - 7.

Front

What is the expression for the cost of each ticket if the total cost is $324 and 'x' is the number of tickets?

Back

Front

How do you express a total amount earned over a period of time?

Back

To express total earnings, multiply the amount earned per time period by the number of time periods. For example, if Jordan earns $100 per week for 'x' weeks, the expression is: 100x.

Front

What does 'divided by' mean in an expression?

Back

Front

How do you write an expression for total expenses including a fixed cost and variable costs?

Back

Total Expenses = Fixed Cost + (Variable Cost per Item * Number of Items). For example, if parking costs $12 and tickets cost $10 per person for 'p' people, the expression is: 12 + 10p.

Front

What is the difference between an equation and an expression?

Back

An equation states that two expressions are equal, while an expression is a combination of numbers and variables without an equality sign.

Front

How do you represent a situation where one quantity is greater than another?

Back

You can represent this with addition. For example, if Ben has 'x' dollars and Cam has 7 more dollars, the expression is: x + 7.