Variables and Expressions Flashcard!

Front

34x and -x are . . .

Back

like terms

Front

Like terms have the same ___________ and ______________

Back

variables, exponents

Front

A constant is . . .

Back

a number

Front

8.5ac and 10ac are . . .

Back

like terms

Front

Evaluate the expression when x = 10: (x + 2) ÷ 6

Back

2

Front

What is a variable?

Back

A symbol (usually a letter) that represents a number in an expression or equation.

Front

What is an expression?

Back

A combination of numbers, variables, and operations without an equality sign.

Front

What is the difference between a variable and a constant?

Back

A variable can change, while a constant is a fixed value.

Front

What are coefficients in an expression?

Back

Numbers that multiply a variable, like 3 in 3x.

Front

What does it mean to evaluate an expression?

Back

To calculate the value of the expression by substituting variables with numbers.