2-1 Using Variables to Write Expressions

Front

What is a variable in algebra?

Back

A symbol, often a letter, that represents a number in mathematical expressions and equations.

Front

Write an algebraic expression for the sum of a number x and 10.

Back

x + 10

Front

What does it mean to write an expression?

Back

To create a mathematical phrase that represents a quantity using numbers, variables, and operations.

Front

Write an algebraic expression for the product of 4 and a number y.

Back

4y

Front

What is an algebraic expression?

Back

A combination of numbers, variables, and operations (like addition, subtraction, multiplication, and division) that represents a value.

Front

Write an algebraic expression for the quotient of a number z and 3.

Back

z / 3

Front

What is the difference between an expression and an equation?

Back

An expression does not have an equality sign, while an equation does.

Front

Write an algebraic expression for 5 less than a number a.

Back

a - 5

Front

What does 'the difference of' indicate in an expression?

Back

It indicates subtraction between two quantities.

Front

Write an algebraic expression for 9 times the sum of a number b and 2.

Back

9(b + 2)