08+Solving+Inequalities

Sections 6-1 through 6-3

6-1 Solving Solving an Inequality is mostly the same as solving an equation but instead of an equal sign there are others signs that can change depending on the neg. or pos. sign that’s attached to the number. The main idea of solving an inequality is to make a true statement In between the variable and the number there can be many different signs To make a true statement you must have only one variable on one side, and one number on the other In order to do this you must cancel out a number on the wrong side by adding or subtracting the number to the other side Any thing you do to one side of the inequality you must do to the other r+19>16 In this situation you need to subtract the 19 to the other side of the inequality and the inequality becomes r>-3 The problem is 2r-10>16 1st step- add the ten to the other side of the equation Now the problems reads 2r>26 2nd step- divides the 2r by the 26 so the r is alone Now the problem reads r>13 Lets say the 2r was a negative 2r then when you divide the -2r by the 26 the sign separating the variable and number would flip making is <. Graphing
 * 1) > Which means greater than
 * 2) < Which means less than
 * 3) < with a line underneath means less than or equal to
 * 4) > with a line underneath means greater than or equal to
 * 5) = Which means equal t

Writing From a Graph Websites - Extra Help 1 Extra Help 2 Extra Help 3