Introducing Algebraic Variables

six times the number of girls
Let g = number of girls

• 6 + g

• 6g

• g - 6

What is an algebraic expression made of?

• Numbers and operations

• Numbers and multiplication

• Addition and multiplication

• Numbers and variables

d + d + d + d =

• d⁴

• 4d

• d4

• 4 + d

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

• n - 9

• n + 9

• n/9

• 9n

Which of the following is the correct expansion of:
5(r - 2)?

• 5r - 2

• 5r +2

• 5r + 10

• 5r - 10

If y = 7, find the value of 2(y+4).

• 11

• 22

• 20

• 12

If a = 4 and b = 6, what is the value of 3a + 5b?

• 40

• 42

• 44

• 46

Simplify: 4x² - 3x + 11 -2x

• 4x² - 5x + 11

• 11x + 11

• 16x² - 5x + 11

• 10x²

3b + b - 2b 

• 3b

• b

• 2b

Simplify the expression: 7v + 2 + 12 + 2v

• 23

• 23v

• 9 + 14v

• 9v + 14