Identifying Parts of an Expression

What is the main difference between an expression and an equation?

• An equation contains an equal sign, while an expression does not.

• An expression contains an equal sign, while an equation does not.

• An expression contains only numbers, while an equation contains variables.

• An equation contains only numbers, while an expression contains variables.

Which of the following is an example of a constant?

• 5x

• 3y

• 14

• 2x^2

What makes a number a variable?

• It is a number attached to a letter.

• It is a number that is always positive.

• It is a number with an exponent.

• It is a plain number without any letter.

Which of the following is a coefficient in the term 4y?

• 4y

• None of the above

• y

• 4

In the term 3x^2, what is the exponent?

• x

• None of the above

• 3

• 2

Which of the following pairs are like terms?

• 10 and 12x

• 2x^2 and 3x^2

• 4x and 3x^2

• 6x and 6y

What must be the same for terms to be considered like terms?

• The coefficients

• The variables and exponents

• The signs (positive or negative)

• The constants

Which of the following is an example of an expression?

• 7y = 21

• 5 + 3 = 8

• 4x - 2

• x^2 + y^2 = z^2

In the expression 4d - 9, what is the term that includes the variable?

• 4

• d

• 9

• 4d

What is the role of an operator in an expression?

• It represents the unknown number.

• It indicates the mathematical operation to be performed.

• It is a plain number without any variable.

• It is the number in front of a variable.