## Algebra 1

$w\geq-5$
$-4w\leq20\longrightarrow$ divide both sides by -4; reverse the inequality sign $-4w\div-4\geq20\div-4\longrightarrow$ divide $w\geq -5$ Check the endpoint. $-4(-5)\overset?=20$ $20=20\checkmark$ Check the inequality. $-4(1)\overset?\leq20$ $-4\leq20\checkmark$ Since -5 is included in the solution, the endpoint of the graph is a solid circle.