The value of the number from the given statement is required.
The interval notation is [tex]x\in (-\infty,6],[11,\infty)[/tex]
Let [tex]x[/tex] be the given number
so, it is decreased by 2
[tex]x-2[/tex]
It is less than or equal to [tex]4[/tex]
[tex]x-2\leq 4\\\Rightarrow x\leq 6[/tex]
Or it is greater than or equal to [tex]9[/tex]
[tex]x-2\geq 9\\\Rightarrow x\geq 11[/tex]
The interval notation is [tex]x\in (-\infty,6],[11,\infty)[/tex]
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