Evaluating Algebraic Expressions

Evaluate 3x + 8   if x = 2

• 13

• 14

• 15

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Evaluate 2r + 1      if   r = 3

• 6

• 5

• 7

• 8

evaluate bc + 5a  
when  a = 3, b = 4, and c = -6

• 9

• 38

• -38

• -9

b² + 4
when b = 3

• 10

• 12

• 13

• 11

For a monthly family cookout, David buys 3 packages of hot dogs and 4 packages of hamburger patties. Hot dog packages each contain x hot dogs. Hamburger packages each contain y hamburger patties. Complete the expressions for the total number of hot dogs and hamburger patties David buys for 6 cookouts. 6( ​ (a)   x + ​ (b)   y)

​ (c)   x + ​ (d)   y

• 3

• 4

• 18

• 24

• 7

For a monthly family cookout, David buys 3 packages of hot dogs and 4 packages of hamburger patties. Hot dog packages each contain x hot dogs. Hamburger packages each contain y hamburger patties. Complete the expressions for the total number of hot dogs and hamburger patties David buys for 6 cookouts.

• 3

• 4

• 18

• 24

• 7

Find the value of the expression.

• -12

• 12

• 14

• -14

Evaluate when a = 15:
2(a - 5) + 2

• 22

• 27

• 14

• 7

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

• 3

• 12

• 1

• 0

2x + 3 + x²; for x = 4

• 17

• 27

• 19

• 25