Evaluating Algebraic Expressions

Three times a number increased by nine

• 3h-9

• 3(h-9)

• 3(h+9)

• 3h+9

What are the variables of 7x+6y-9

• 6,7

• 9

• 6y, 7x

• x, y

Name the coefficient of ⅙h

• 6

• h

• ⅙

• 1

Evaluate 3x + 8   if x = 2

• 13

• 14

• 15

• 16

Evaluate 2r + 1 if r = -3

• -5

• 5

• 7

• -7

Evaluate x² when x = -2

• 4

• -4

• 2

• -2

b² + 4
when b = 3

• 10

• 12

• 13

• 11

6a - 3d
when a = 1, d = 2

• 3

• 12

• 1

• 0

Evaluate m² if m = 5

• 10

• 25

3(2x + z) when x=8 and z=2

• 12

• 30

• 54

• 60