Chapter 7, Day 14 Warm Up

Front

What expression represents the number of candies Kayla ate if she ate 3 more than twice as many pieces of candy as Luke?

Back

Front

If the number of students at Abbott Middle School is 15 less than 3 times the number of students at Gainesville Middle School, what expression represents the number of students at Abbott?

Back

Front

Kathy adds $40 to her savings after babysitting. What expression represents her total savings?

Back

Front

Cody has $450 in his savings account and adds $20 each week. What expression represents his total savings after x weeks?

Back

Front

What expression represents the total cost of tickets for a group of people if tickets cost $25 each?

Back

Front

Define a variable in an expression. What does it represent?

Back

A variable is a symbol (like x or s) that represents an unknown value in an expression.

Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operations (like addition or multiplication) that represents a value.

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting the variables with specific numbers.

Front

What is the difference between an expression and an equation?

Back

An expression does not have an equality sign, while an equation states that two expressions are equal.

Front

What is the purpose of using variables in expressions?

Back

Variables allow us to represent unknown quantities and create general formulas that can apply to many situations.