Algebraic Expressions

If x = 3 , what is the value of 7x + 2 ?

Evaluate 5a - 3 when a = 4 .

What is the result of 8b when b = 5 ?

Solve 4(e + 3) when e = 2 .

What is 3f - 5 if f = 9 ?

What is the difference between an algebraic and numerical expression?

• They both have numbers but algebraic has negative numbers and numerical only has positive numbers.

• Numerical expressions have just numbers and algebraic have numbers and variables.

What is the meaning of a variable in an algebraic expression?

• A variable represents a fixed number.

• A variable represents an unknown number or quantity.