Question

solve the inequality and graph the solution.
\frac{a + 1}{9}leq1
plot the endpoints. select an endpoint to change it from closed to open. select the middle of the segment, ray, or line to delete it.

Explanation:

Step1: Multiply both sides by 9

$9\times\frac{a + 1}{9}\leq9\times1$
$a + 1\leq9$

Step2: Subtract 1 from both sides

$a+1 - 1\leq9 - 1$
$a\leq8$

Answer:

The solution of the inequality is $a\leq8$. On the number - line, we plot a closed circle at 8 (since the inequality is $\leq$) and draw a ray to the left of 8.