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Help please ? What’s the inequality?

Help please ? What’s the inequality?-example-1

1 Answer

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Answer:

-1 < x < 5

Explanation:

The open circle at -1 and the shading to its right tells you ...

-1 < x

The open circle at 5 and the shading to its left tells you ...

x < 5

Both of these are true together, so the compound inequality representing that is ...

-1 < x < 5

_____

Additional comments

If the circle were filled, the relation would include the "or equal to" case: ≤.

I like to use the "left-pointing" relation symbols (<, ≤) because they put the numbers and variables in the same relationship they are on the number line. That is, -1 is on the left end of the shaded segment; the shading (variable value) is in the middle, and 5 is on the right end--the same as ...

-1 < x < 5

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