CLASS REVIEW -ALGEBRA

What is a variable in Algebra?

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

What is an algebraic expression made of?

• Numbers and operations
• Numbers and multiplication
• Addition and multiplication
• Numbers and variables

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

• r/3
• r + 3
• r - 3
• 3r

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

• Expression
• Term
• Equation
• Operator

Which is an equation?

• 4x = 9
• 4x - 9
• 4x
• - 9

Simplify

a + a = ?

• a²

• a¹

• 2a

• aa

Simplify

2b + b

• 3b

• b³

• b

• 2b

Simplify

4a x 8b

• 12ab

• 4ab

• ab

• 32ab

y + y + y =

• 3y
• 3 + y
• y + 3
• y/3

4y - 2y =

• 2y
• 6y
• y + 2
• y - 2