Question

solve the inequality and graph the solution.
20 < -20d
plot the endpoints. select an endpoint to change it from closed to open. smiddle of the segment, ray, or line to delete it.

Explanation:

Step1: Divide both sides by -20

When dividing an inequality by a negative number, the inequality sign flips. So, $\frac{20}{-20}>\frac{-20d}{-20}$.

Step2: Simplify

Simplifying gives $- 1>d$, which can be written as $d < - 1$.

Answer:

The solution of the inequality is $d < - 1$. On the number - line, we plot an open circle at $-1$ (because the inequality is strict, $d$ is not equal to $-1$) and draw a ray to the left of $-1$.