Modeling and Evaluating Expressions

Which expression is represented?

• -2x + 4

• 4x - 2

• 2x + 4

• 2x - 4

Which expression is represented?

• 3x + 3

• 3x -2

• -3x + 3

• -3x - 2

Simplify.

• 5 + 3x

• 8x

• 8

• 3x + 5x

Evaluate x ÷ 4 if x = 80

• 4

• 20

• 40

• 80

3r + 2e; r = 3  e = 2

• 15

• 13

• 54

• 12

Simplify the following:  
-8 + (15 - 3) ÷ 4

• -5

• 1

• -11

• 11

Evaluate n³ if n = 4

• 12

• 16

• 32

• 64

Evaluate 3x + 8   if x = 2

• 13

• 14

• 15

• 16

Evaluate when x = 8:
2x + x - 10

• 34

• 22

• 14

• 24

Evaluate the expression when x = 3. 
2x² - 5

• 31

• 12

• 7

• 13