Expressions Terms and Variables

Plugging in a number for a variable is called

• operation

• evaluation

• substitution

• solving

A variable is . . .

• an awesome number

• a number represented by a letter

• an infinite number

• a number multiplied by another number

-6k + 7k=

• k

• -k

• 12k

• -12k

11r - 12r

• 13r

• -1

• -r

• 13

-4x - 10x

• -14

• 6x

• -6x

• -14x

-4x + 10x

• -14

• 6x

• -6x

• -14x

34x and -x are . . .

• like terms

• not like terms

-7a⁴b and 3a⁴b are . . .

• like terms

• not like terms

Evaluate the expression when x = 4

5 + x

• 5

• 5 + x

• 9

• 1

Evaluate the expression when e = 2 10 - e + 4

• 12

• 14

• 9

• 7