Understanding Algebraic Expressions

What is a variable in algebra?

• A symbol representing an unknown value

• A number that multiplies a variable

• A mathematical operation

• A fixed number

What is the role of a coefficient in an algebraic expression?

• It is a symbol representing an unknown value

• It is a number that multiplies a variable

• It is a number that divides a variable

• It is a standalone number

Which of the following is a constant?

• 7

• 2y

• x + 3

• 5x

Which of these is not an operator?

• Multiplication

• Variable

• Subtraction

• Addition

What does the expression 3x + 2 represent?

• Three times a number plus two

• Two times a number plus three

• Three plus two times a number

• A number divided by three plus two

How would you express 'a number tripled' in algebraic terms?

• 3x

• x + 3

• 3 + x

• x/3

What is the algebraic expression for 'three more than the quadruple of a number'?

• 4x + 3

• 3x + 4

• 3 + 4x

• x + 4

How would you write the sum of a number and five?

• 5 - x

• x + 5

• 5x

• x - 5

If you have two different unknown numbers, how should you represent them?

• Use different variables for each

• Use operators to differentiate them

• Use the same variable for both

• Use a constant for one and a variable for the other

What is the algebraic expression for 'the sum of the same unknown number'?

• 2x + y

• x + y

• x - x

• x + x