Question

|x+9| is greater than or equal to 0. Solve and graph the solution set on a number line.

Answer 1

|x+9| ≥ 0
x+9 ≥ 0 or -x-9 ≥ 0

x ≥ -9 or x ≤ -9
so x is any real number

We could have seen that from the start

|x+9| ≥ 0 by the very definition of the absolute value.
|anything| ≥ 0

Answer 2

So would the set be (-9,‡)?

Answer 3

The is 10/9