Can someone explain this to me?

Answer:
Step-by-step explanation:
You can solve inequalities like regular equations, except there’s a catch.
For example, lets take the 1st one.
22 < z
You would put an OPEN dot on 22, since it is NOT included. And then graph the line.
The draw a line heading right because z is GREATER than z, z>22
And it goes on forever. See attachment below.
Let me know if you have any questions, i would be happy to answer them! Hope you understand!