Chapter 3 - Solving Inequalities - 3-3 Solving Inequalities Using Multiplication or Division - Practice and Problem-Solving Exercises - Page 181: 22

w≥−5

−4w≤20⟶ divide both sides by -4; reverse the inequality sign −4w÷−4≥20÷−4⟶ divide w≥−5 Check the endpoint. −4(−5)=?20 20=20✓ Check the inequality. −4(1)≤?20 −4≤20✓ Since -5 is included in the solution, the endpoint of the graph is a solid circle.