1 Answer

Laurieann · Answer 1 · 2022-08-03T06:53:25+0000

Answer:
$(-\infty ,-0.12]$

Curved parenthesis for negative infinity. Square bracket for the -0.12

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Step-by-step explanation:

The inequality
$x \le -0.12$ is the same as
$-\infty < x \le -0.12$

This says that x is larger than negative infinity, but smaller than or equal to -0.12

Put another way: x is between negative infinity and -0.12, x could also equal -0.12

To write this in interval notation, we would say
$(-\infty ,-0.12]$

We always use a curved parenthesis for either infinity. The square bracket indicates "include this endpoint as part of the interval".

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