Algebra Review

x + 4 = 12

• x = 6

• x = 8

• x = 14

• x = 10

c + (10 - 5) = 10

• c = 5

• c = 10

• c = 15

• c = 25

a + 100 - 2 = 118

• a = 20

• a = 128

• a = 118

• a = 90

b + b + b = 12

• b = 3

• b = 12

• b = 9

• b = 4

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

• n - 9
• n + 9
• n/9
• 9n

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

A symbol for an unknown value is called a _______________. It is usually a letter such as a, X or Y.

• Constant
• Coefficient
• Operator
• Variable

A mathematical sentence in which there are 2 expressions on either sided of an equal sign.  

• Expression
• Term
• Equation
• Operator

What is the operation of the following expression?   x/5

• multiplication 
• addition 
• subtraction 
• division