Basic Algebra Review

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

• n - 9

• n + 9

• n/9

• 9n

take 10 away from s 

• 10 - s 

• s + 10

• s - 10

• s/10

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

• 6 + g

• 6g

• g - 6

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

• r/3

• r + 3

• r - 3

• 3r

If the mean of the numbers 4, 8, x, and 12 is 9, what is the value of x?

• 12

• 10

• 11

• 13

What word phrase can you use to represent "5x + 2"?

• five times the sum of a number x and two

• two times the sum of a number x and five

• a number x times the sum of five and two

• the sum of five times a number x and two

7 less than a number d

• 7 - d

• d - 7

How many blocks will the next term have?

• The next term will have 16 blocks

• The next term will have 15 blocks.

• The next term will have 14 blocks.

• This is the end of the pattern.

4 + N = 8, What is N

• 2

• 3

• 4

• 5

The sum of 6 and x

• x + 6

• 6/x

• x + 4

• 6x