Evaluate Expressions with Variables

Front

What is a variable in mathematics?

Back

A symbol used to represent an unknown value, often denoted by letters like x, y, or z.

Front

Evaluate the expression: 24 + s if s=10

Back

34

Front

What does it mean to evaluate an expression?

Back

To calculate the value of an expression by substituting variables with their given values.

Front

Evaluate the expression: 4w + 3 if w=2

Back

11

Front

What is the result of adding two variables, r and b, if r=3 and b=5?

Back

8

Front

Evaluate the expression: 4 + 2n if n=5

Back

14

Front

What is the purpose of using variables in expressions?

Back

To represent unknown quantities and to create general formulas that can be applied to different situations.

Front

Evaluate the expression: 3h if h=3

Back

9

Front

What is an expression in mathematics?

Back

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

Front

If x=4, what is the value of the expression 2x + 1?

Back

9