**TI83F* AppVariable file 12/24/08, 18:09  GLA201 nav 26CE319875DD4F1B9DFDCB650E5220B1GLA201.$GLA2011  absolute valueabsolute value:The absolute value of a number a is its distance from zero on a number line and is represented by |a|.Example: The absolute value of -2 is 2, or |-2| = 2. algebraic expressionsalgebraic expressions:An expression consisting of one or more numbers and variables along with one or more arithmetic operations. compound inequalitycompound inequality:Two or more inequalities that are connected by the words AND or OR.Examples: x > 5 and x < 9; also written as 5 < x < 9.  empty setxempty set:A set with no elements shown by the symbol { } or . A solution set with no members. Also called as null set. equationfequation:A mathematical sentence stating that two expressions are equal.Example:3 (7 + 8) = 9 5 extraneous solution Jextraneous solution:A number that does not satisfy the original equation. formulaformula:An equation that states a rule for the relationship between certain quantities.Example: A = r^2 is the formula for finding the area of a circle.  infinity 2infinity:Without bound, or continues without end.   integers Tintegers:The set of whole numbers and their opposites {. . .-2, -1, 0, 1, 2. . .}.   intersectionkintersection:The set of elements common to two or more sets as in compound inequalities and Venn diagrams.  interval notation Ginterval notation:A way to describe the solution set of an inequality.  irrational numbersirrational numbers:Numbers that cannot be expressed as fractions, terminating decimals, or repeating decimals.Examples: 3, , 5, e  natural numbers ,natural numbers:The set {1, 2, 3, 4, 5, }.  open sentenceCopen sentence:A mathematical statement with one or more variables. order of operationsorder of operations:1. Evaluate expressions inside grouping symbols.2. Evaluate all powers.3. Do all multiplications and/or divisions from left to right.4. Do all additions and/or subtractions from left to right. rational numbersrational numbers:The set of numbers that can be written in the form a/b, where a and b are integers and b  0.Examples:1 = 1/1, 2/9, -2.3 = -2 3/10  real numbersJreal numbers:The set of rational numbers and irrational numbers together. set-builder notationset-builder notation:A concise way of writing a solution set.Example: {t | t < 17} represents the set of all numbers t such that t is less than 17. solutionsolution:A replacement value for the variable in an open sentence. A value for the variable that makes an equation true.Example: The solution of 12 = x + 7 is 5. unionunion:The graph of a compound inequality containing the word 'or'; the solution is a solution of either inequality, not necessarily both.  variablesUvariables:A letter or other symbol used to represent an unspecified number or value. whole numbers *whole numbers:The set {0, 1, 2, 3, 4, }.8