Learning Variable Expressions

Identify the variable in the expression 3x +  9

• x

• y

• 9

• 3x

Simplify the expression: 7v + 2 + 12 + 2v

• 23

• 23v

• 9 + 14v

• 9v + 14

Identify the coefficient in the expression
4m + n + 2

• 2

• 4

• m

• n

The number before a variable is the _____.

• term

• constant

• coefficient

• variable

Evaluate the following expression: 2b + 3

Where b = 7

• 30

• 12

• 17

• 24

What is a variable?

• a term that includes a variable

• a letter that stands for an unknown number

• a term that is a known number without variables

How many terms are in the expression 10 - 4x + y ?

• 1

• 2

• 3

• 4

What is the coefficient in the expression 10-4x?

Combine like terms:

5x + 3x - 9

• 7x - 9

• 17x

• 8x - 9

• -x

Combine like terms:

8y + 5 - 2y

• 6y + 5

• 11y

• 10y + 5

• 15y