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

What does it mean to write an expression from a word problem?

Back

It means to translate the words and phrases in the problem into a mathematical expression that represents the situation described.

Front

In the expression 150 + 50c, what does 'c' represent?

Back

In this expression, 'c' represents the number of cavities found by the dentist.

Front

What is the total cost of a dentist visit if there are no cavities?

Back

The total cost would be $150, as there are no additional charges.

Front

How do you represent a monthly charge in an expression?

Back

You multiply the monthly charge by the number of months, for example, 30m for $30 per month.

Front

What does the term 'activation fee' refer to in a service contract?

Back

An activation fee is a one-time charge that is applied when starting a new service.

Front

In the expression 10h - 25, what does 'h' represent?

Back

In this expression, 'h' represents the number of hours worked by the Lyft driver.

Front

What is the significance of the negative sign in the expression 10h - 25?

Back

The negative sign indicates that $25 is being subtracted from the total earnings to account for gas expenses.

Front

How do you calculate the total cost for a group attending an event?

Back

You add the fixed costs (like parking) to the variable costs (like ticket prices per person).

Front

What does the expression 2x - 4 represent in the context of age?

Back

It represents the age of Mr. Williams's mother, where 'x' is Mr. Williams's age.