How do you solve and write the following in interval notation: x <= -7?

May 7, 2017

$\left(- \infty , - 7\right]$

Explanation:

$\text{the inequality is already solved}$

$\text{that is " x<=-7" is the solution}$

$\text{this means that x can take values less than or equal to - 7}$

$\text{in interval notation this is expressed}$

$\left(- \infty , - 7\right]$

$\text{the parenthesis on the left indicates x cannot take this value}$

$\text{the 'square bracket' on the right indicates x can}$
$\text{take the value of - 7}$