Algebraic Expressions

Front

What is an algebraic expression?

Back

An algebraic expression is a mathematical phrase that includes numbers, variables, and operations (like addition, subtraction, multiplication, and division).

Front

What is a variable in algebra?

Back

A variable is a symbol (often a letter) that represents an unknown value in an expression or equation.

Front

Evaluate 5y + 2 if y = 3.

Back

17

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting the variables with their given values.

Front

What is the coefficient in the expression 4x?

Back

The coefficient is the number in front of the variable, which is 4 in this case.

Front

Evaluate 2(a - 5) + 2 when a = 15.

Back

22

Front

What are the variables in the expression 3x + 4y - 1?

Back

The variables are x and y.

Front

What is the constant in the expression 3x + 4y - 1?

Back

The constant is the number that does not change, which is -1 in this case.

Front

Evaluate 4x if x = 5.

Back

20

Front

What is the difference between an expression and an equation?

Back

An expression is a combination of numbers and variables without an equality sign, while an equation states that two expressions are equal.