Evaluating Expressions

Evaluate  n - 1  when n= 28

• 27

• 281

• 11

• 29

Evaluate  6x + 2   when x=2

• 64

• 14

• 10

• 8

Evaluate  2n - 1  when n= 10

• 11

• 19

• 210

• 8

Evaluate  12 +  5k   when k= 2

• 125

• 127

• 22

• 10

Find the value of the expression.

• -12

• 12

• 14

• -14

What expression does this number line represent?

• 4n - n

• 2n + n

• 8n - 2n

• 16n - 4n

Write a linear expression for the perimeter of the figure. Then find the perimeter of the figure if x = 3.

• 6x − 8; 10 yd

• 10x − 6; 24 yd

• 16x − 8; 40 yd

• 14x − 8; 34 yd

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

Evaluate expression: 5a + b for a= 6 and b= 3

• 33

• 36

• 30

• 59

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