8: Systems and Matrices Last updated Feb 13, 2022 Save as PDF 7.5: Vector Projection 8.1 Systems of Two Equations and Two Unknowns Page ID237 ( \newcommand{\kernel}{\mathrm{null}\,}\) 8.1 Systems of Two Equations and Two Unknowns8.2 Systems of Three Equations and Three Unknowns8.3 Matrices to Represent Data8.4 Matrix Operations8.5 Row Operations and Row Echelon Forms8.6 Augmented Matrices