Replace a Variable with a Number

Evaluate the expression

• -5

• 7

• 23

• 25

Evaluate the expression

• -45

• 51

• 27

• -21

Evaluate the expression

• 13

• 17

• 37

• 6

Evaluate the expression

• 2

• -2

• 24

• -20

Evaluate the expression

• 14

• 8

• 7

• 112

Evaluate the expression

• -19

• -1

• -31

• 3

Evaluate the expression

• 10

• -180

• 88

• -28

Define: Evaluating an expression

• Finding the value of the variable

• Finding the value of the expression when given substitution values

What definition fits the vocabulary word of variable best?

• it is a letter or symbol that represents an unknown number

• its a number that you have to find

• only the letter x

• x or y, there is no other letters

What is the best definition of a coefficient?

• the coefficient is the number that is tied to the variable through multiplication

• it's the number that sits in front of a variable

• it's a whole number

• it's doesn't matter