Answer
$d\geq-1$
Work Step by Step
$\frac{3}{5}+d\geq -\frac{2}{5}\longrightarrow$ subtract $\frac{3}{5}$ from each side
$\frac{3}{5}+d-\frac{3}{5}\geq -\frac{2}{5}-\frac{3}{5}\longrightarrow$ subtract
$d\geq -1$
Check the endpoint.
$\frac{3}{5}+(-1)\overset?=-\frac{2}{5}$
$-\frac{2}{5}=-\frac{2}{5}\checkmark$
Check the inequality.
$\frac{3}{5}+0\overset?\geq-\frac{2}{5}$
$\frac{3}{5}\geq-\frac{2}{5}\checkmark$
Since -1 is included in the solution, the endpoint of the graph is a solid circle.
