| A | B |
|---|
| variable | Any symbol that can be used as a number. |
| open sentence | A sentence that has aa variable in it. |
| solution set | The value or set of values that makes the sentence true. |
| equation | A sentence that uses the mathematical verb "=". |
| inequality | A sentence that uses any mathematical verb other than "=". |
| interval | A set of numbers between two numbers "a" and "b", possibly including "a" and "b". |
| domain | All values which may be meaningfully substituted for the variable. |
| set | A collection of elements. |
| empty set | The set that contains no elements. |
| N(S) | The number of elements in a set. |
| discrete | A math situation that involves counting and is graphed by dots. |
| continuous | A math situation that requires measurement and is graphed as an interval.. |
| whole numbers | The counting numbers plus the number zero. |
| integers | The whole numbers and their opposites. |
| real numbers | All numbers that can be represented as finite and infinate decimals. |
| pattern | A general idea for which there are many examples. |
| instance | An example of a pattern. |
| counterexample | An instance that shows that a pattern is not true. |
| hypotenuse | The longest side of a right triangle |
| legs | The sides of the right angle in a right triangle. |
| model | A general pattern that includes many of the uses of the operation. |
| multiplicative identity | The number one. |
| reciprocal | The number that gives a product of one when multiplied by a given number. |
| algebraic fractions | Fractions that have variables in the numerator or the denominator. |
| opposites | Two numbers whose sum is zero. |
| elegant | A procedure that is both clever and simple. |
| permutation | An arrangement of letters, names, or objcts. |
| intersection | The set of elements that are in more than one of the identified sets. |
| union | The set of elements that is in either or both of the identified sets. |
| n! (read n factorial) | The product of the integers from n to 1. |
