Question

solve the inequality and graph the solution.
13d - 20 < 19
to draw a ray, plot an endpoint and select an arrow. select an endpoint to change it from closed to open. select the middle of the ray to delete it.

Explanation:

Step1: Add 20 to both sides

$13d-20 + 20<19 + 20$
$13d<39$

Step2: Divide both sides by 13

$\frac{13d}{13}<\frac{39}{13}$
$d < 3$

To graph: Plot an open - circle at 3 (since the inequality is $d<3$ not $d\leq3$) and draw an arrow to the left.

Answer:

The solution of the inequality is $d < 3$. On the number - line, an open circle is at 3 and the arrow points to the left.