Evaluate Expression by Substitution

Evaluate the expression: x + 2 when x = 6

• 8
• 4
• 12
• 10

What is the value of 3x²-7

when x=-5

• -57

• 43

(3 + 4)² - 32 

• 7
• 112
• 17
• -7

If a = 4 and b = 6, what is the value of 3a + 5b?

• 40
• 42
• 44
• 46

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

• 5
• 10
• 12
• 7

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

9y ÷ (2x+1)

• 5

• 10

• 9

• 19

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

13y - zx ÷ 4

• 9

• 36

• 181

• 34.75