| A | B |
|---|
| empty set | a set having no elements. |
| equation | statements that two numbers or expressions are equal. |
| finite set | its elements can be counted or listed |
| null set | another name for empty set |
| open sentence | sentence with at least one variable |
| replacement set | possible values of a variable in an open sentence. |
| set-builder notation | identifies a set with properties. |
| solution set | subset of the replacement set that makes the equation true |
| roster notation | when each element of the set is shown |
| variable | letters used to represent unknown numbers |
| infinite set | its elements can not be counted or listed |
| absolute value of a number | the distance between the number and zero. |
| coordinate of a point | the number that corresponds to that point. |
| integers | set that consists of the whole numbers and their opposites |
| irrational numbers | any nonterminating and nonrepeating number. |
| natural numbers | set of counting numbers |
| rational numbers | fractions made up of integers. |
| real numbers | any rational or irrational numbers |
| whole numbers | natural numbers plus the zero |
| opposites | a pair of numbers located at the same distance of zero |
