Chapter 3 Linear Systems and Matrices - 3.3 Graph Systems of Linear Inequalities - 3.3 Exercises - Skill Practice - Page 171: 24

See the graph

We graph the equations exactly like we did for the system of two inequalities. First graph: $x + y \lt 5$ (blue) $x +y\gt -5$ (pink) $x-y \lt 4$ (black) and $x - y \gt-2$ (green) Using the shading on the attached graph, we know that the intersection of all three inequalities is the solution.