Basic Letters Represent Numbers Algebra

Solve for x.

• x = 2

• x = 3

• x = 5

• x = 10

Edward's pizza had 23 pepperonis. Then he picked off n pepperonis. Now there are 12 pepperonis left. What algebraic equation shows this situation?

• 12n = 23

• n + 23 = 12

• 23 + 12 = n

• 23 - n = 12

Julius has v gold coins. After some time, he doubled his amount of gold coins. Which algebraic expression shows how many gold coins Julius has?

• 2v

• 2 + v

• 2 - v

• 2 / v

Is 3 a solutions for 20 - y = 17

• Yes

• No

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

• n - 9

• n + 9

• n/9

• 9n

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

• n - 9

• n + 9

• n/9

• 9n

Which of the following best describes the algebraic expression 3(x - 5)?

• Three times a number minus five

• Three times the quantity of a number minus five

• Three times the quantity of a number plus five

• Three times a number plus five

Match the following

• x + 9

• half a number

• 2x

• 9 less than a number

• x - 9

• The sum of a number and 9

• x/2

• twice a number

• 9 - x

• The difference of 9 and a number

Mrs. Guang purchased four airline tickets to Florida. She will also pay a fee of $55 for an extra piece of luggage. Define a variable and write an expression to represent her total cost of flying to Florida.

• l = (pieces of) luggage

• 4l + 55

• 55t + 4

• t = (number of) tickets

• 4t + 55

• 55l + 4

What is an algebraic expression for "the difference of r and 3"?

• r/3

• r + 3

• r - 3

• 3r