- algebraic equation: a number sentence that contains an equal sign and algebraic expressions - ex. y + 2 = 5
- algebraic expression: an expression that contains a variable - ex. x - 2
- coordinate: One of the two numbers in an ordered number pair
- equation: a number sentence that contains an equal sign - ex. 2 + 5 = 7
- expression: a group of mathematical symbols that represents a number and does not contain a relation symbol (=, <, >) - ex. 5 * 4
- formula: a general rule for finding the value of something
- variable: a letter or other symbol that represents a number