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What is the most important difference between an expression and an equation?

• they're spelled different

• an equal sign

• only equations have variables

• only expressions have variables

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

Who is the constant in the following:

24x + 4 - 22y = e

• 24x

• 22y

• =

• 4

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

• term

• variable

• coefficient

• constant

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

• term

• variable

• coefficient

• constant

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

A term is...

• a 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