Introductory and Intermediate Algebra Fall 2009 Update - For Instructor and Student clients December 9, 2009 Updates version 2.5.0 (Fall 2009) to version 2.5.1: Corrects issues in the following lessons: 2.4 Solving Linear Equations 3.5 Solving Linear Inequalities 4.3 Graphing Linear Equations in Slope-Intercept Form 5.2a Simplifying Integer Exponents II 7.2 Addition and Subtraction of Rational Expressions 9.1 Solving Systems of Linear Equations by Graphing