Numerical and Variable Expressions

Which of the following is a numerical expression?

• 3 - 1 = 2

• 3 - 1

• 3x - 1

• 3x - 1 = 2

How many variables are there in this equation:

3x + 14 - 5y = 42

• 1

• 2

• 3

• 4

Who is/are the coefficient in the following expression?

5x - 8y + 3

• 5

• 8

• 5 and 8

• 3

What operation is this:

2x

• addition

• subtraction

• multiplication

• division

In the expression 5x - 3, 5 is the...

• term

• variable

• coefficient

• constant

In the expression 5x - 3, x is the...

• term

• variable

• coefficient

• constant

In the expression 5x - 3, 3 is the...

• just a 3

• variable

• coefficient

• constant

What operation is 15y?

• multiplication

• division

• addition

• subtraction

A variable is...

• the number in front of a letter

• a value that does not change

• numbers and letters separated by operations

• an unknown number represented by a letter

A coefficient is...

• the number in front of a variable

• numbers and letter separated by operations

• a value that does not change

• an unknown number represented by a letter