linear equation and inequalities

If g is 4 then 5 x g =

• 25

• 5

• 4

• 20

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

the product of 34 and z 

• 34/z
• z/34
• z X 34
• 34 - z 

2x + 2x =

• x + 4
• 2 + x
• 2 + 2
• 4x

5y - 4y + 8y =

• 17y
• 9
• 9y
• y - 9

2x + 2 + 2x =

• 4x + 2
• 6x
• 2 - x
• 4x

What is a variable in Algebra?

• Something that changes
• An unknown value
• An equation
• A numeric expression

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

• multiplication 
• addition 
• subtraction 
• division