SIMPLIFYING EXPRESSIONS

What is a variable in math?

• The number in front of a letter

• A symbol for a value we don't know yet

• A number on its own that has a fixed value

What is a coefficient in math?

• The number in front of a variable used to multiply the variable

• A symbol for a value we don't know yet

• Something that is efficient with something else

• A number on its own that has a fixed value

Are 7x and 5y like terms?

• No, they have different variables.

• Yes, they have the same variables.

Are 7x and 5x like terms?

• No, they have different variables.

• Yes, they have the same variables.

Which of the following shows a variable?

• g + 7
• g + 7 = 10
• g
• 7g

Which of the following shows an expression?

• n + 7
• n - 4 = 8
• n
• 7n

True or Flase.
An algebraic expression does not have an equal sign. 

• True
• False

y + 5x - 10

• coefficient 
• terms
• variables
• constant

x + y

• expression
• equation

x + y = 50

• expression
• equation