3: Systems and Matrices Last updated Aug 31, 2023 Save as PDF 2.5: Linear Regression 3.1: Systems of Linear Equations Page ID139519 ( \newcommand{\kernel}{\mathrm{null}\,}\) 3.1: Systems of Linear Equations3.1.1: Solving a System of Equations Algebraically3.2: Matrices3.2.1: Gaussian Elimination3.3: Solving Using Matrices3.3.1: Gaussian Elimination3.4: Matrix Algebra3.4.1: Matrix Arithmetic3.4.2: Multiplication of Matrices3.4.3: The ijth Entry of a Product3.5: Matrix Inverses3.5.1: The Identity and Inverses3.5.2: Finding the Inverse of a Matrix3.5.3: The Matrix Inverse3.5.3.1: Exercises 2.63.6: Linear Inequalities3.6.1: Solving Systems of Linear Inequalities (Two Variables)3.7: Linear Programming3.7.1: Maximization Applications3.7.1.1: Maximization Applications (Exercises)3.7.2: Minimization Applications