Substitute Expressions

Evaluate the expression: x + 2 when x = 6

• 8

• 4

• 12

• 10

What is the first thing you do when evaluating an expression

• Substitute value in for the variable

• Combine like terms

• Parenthesis

3x + 8   if x = 2

• 13

• 14

• 15

• 16

b(b + 12)
b = 2

• 28

• 14

• 144

• 24

Evaluate the expression.

• 3

• -1.5

• 1.5

• -3

Evaluate the following expression:
-3x² - 5x + 7 when x = -2

• 5

• 10

• 12

• 7

Evaluate m² + 12q if m = 5 and q = -3

• 10

• -25

• -11

• 13

If p = -6, what does -10(p + 4) equal?

• 2

• 20

• -2

• -20

What is the value of 3x²-7 when x=-5

• -57

• 43

Evaluate Expression x=7, y=15, z=8

9y ÷ (2x+1)

• 5

• 10

• 9

• 19