Answer
-12.4
Work Step by Step
The absolute value of a number $a$ is equal to $a$ if $a\geq0$ and is equal to $-a$ if $a\lt0$.
$12.4\geq0$, so $|12.4|=12.4$
Therefore, $-|12.4|=-(12.4)=-12.4$.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.