Creating Algebraic Expressions

What is the algebraic expression for                  "the sum of n and 9"?

• n - 9

• n + 9

• n/9

• 9n

Evaluate the expression when x =2:

3x + 8

• 13

• 14

• 15

• 16

Evaluate the expression when x = 8:

2x + x - 10

• 34

• 22

• 14

• 24

Evaluate the expression when a = 3, b = 4, and c = -6:

bc + 5a

• 9

• 38

• -38

• -9

7 less than a number d

• 7 - d

• d - 7

The sum of 6 and x

• x + 6

• 6/x

• x + 4

• 6x

take 10 away from s 

• 10 - s 

• s + 10

• s - 10

• s/10

the product of 34 and z 

• 34/z

• z/34

• z X 34

• 34 - z 

half of a number, c

• c ÷ 2

• ½ ÷ c

• c ÷ ½ 

• c + ½

Miss Kask made 28 burritos and x tacos. How can you write this as an expression?

• 28 · x

• 28 + x

• 28 - x

• x - 28