Use absolute value and inequality notations to describe the following situations. You may use "$\displaystyle {\mid}$" for absolute value sign; $\displaystyle <=$ for $\displaystyle \leq$ and $\displaystyle >=$ for $\displaystyle \geq$. e.g. you may use "$\displaystyle {\left|{x}\right|}\ >=\ {5}$" for "$\displaystyle {\left|{x}\right|}\geq{5}$".
The distance between $\displaystyle {x}$ and $\displaystyle {21}$ is no more than $\displaystyle {30}$

The distance between $\displaystyle {x}$ and $\displaystyle -{13}$ is at least $\displaystyle {14}$

$\displaystyle {x}$ is at least $\displaystyle {13}$ units from $\displaystyle {0}$

$\displaystyle {x}$ is at most $\displaystyle {21}$ units from $\displaystyle {0}$