Vocabulary
In an expression, the parts being added together or subtracted. Example: 4x, 3x, 3y, or 7y in 4x + 3x + 3y + 7y
What is a term?
5n + 11n
16n
Terms that contain the same variable(s) raised to the same exponent. These terms can be combined. Example: 3x and 9x
What are like terms?
−5n + 3(6 + 7n)
16n + 18
A mathematical phrase that contains numbers, operations, and/or variables (but no = sign). Example: 5x + 4y + 5 - 2x
What is an expression?
−4 + 7(1 − 3m)
-21m + 3
A term that is just a number.
What is a constant?
Like Terms OR Not Like Terms
3x + 2y + 2xy
NOT Like Terms
A symbol, usually a letter of the alphabet, used to represent a quantity that can change.
What is a variable?
−10(1 − 9x) + 6(x − 10)
96x - 70