College Algebra Section 1. 1questions with correct answers

variable - answersA letter such as x or y that is used to represent various numbers example of variable - answersx algebraic expression - answersa combination of variable using addition, subtraction, multiplication, and division, and powers or roots example of an algebraic expression - answersx+5 x-7 3x x/8 4x+6 x^2-1 constant - answersA value that does not change example of constant - answersthenumber4x+4 equation - answersan equation is formed when an equal sign is placed between two separate algebraic expressions example of equation - answersx+4 = x-3 formula - answersan equation that uses letters to express a relationship between two or more variables example of formula - answersarea of a triangle 1/2b * h mathematical modeling - answersprocess of finding formulas to describe real world phenomena set - answerscollection of objects whose contents can be clearly determined example of a set - answers1, 2, 3, 4, ... roster method - answersa form of representation that uses commas to separate the elements of a set the roster method - answers{ 1, 2, 3, 4, 5,... } set-builder notion - answerswhen the elemts of the set are described but not listed the set-builder notion - answers{x|x is a natural number less than 6} real number line - answersgraph used to represent the set of real numbers origin - answersan arbitrary point, labeled 0 natural numbers - answersnumbers used for counting