Mathematical Expressions

In the expression below what is the "d" labeled as?

• dirt

• donuts

• variable

• constant

In the expression below what is the "9" labeled as?

4d-9

• independent

• flamboyant

• constant

• never can count on

Write the phrase as an expression:

the sum of a number and five

• x + 5

• x - 5

• 5x

• x/5

Write the phrase as an expression:

the product of a number and eight

• x + 8

• x - 8

• 8x

• 8/x

• A
• B
• C
• D

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

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

Match the following

• Seven more than x

• seven divided by x

• Seven less than x

• 7 times x

Choose the algebraic expression that matches the verbal phrase.

• A) x + y

• B) x - y

• C) x * y

• D) x / y

• a

• b

• c

• d