Answer:
We are given the inequalities,
and
.
It is known that,
<em>'Zero Test' </em><em>states that: After substituting the point (0,0) in the inequalities,</em>
<em>If the result is true, then the solution region is towards the origin. If the result is false, the solution region is away from the origin.</em>
So, substituting the point (0,0) in the given inequalities give us,
⇒ 0 ≤ 50, which is true. So, the solution region is towards the origin.
And tex]x\geq 20[/tex] ⇒ 0 ≥ 20, which is false. So, the solution region is away from the origin.
Thus, we get the following graph for the solution of the inequalities.