I need to write an interval notion for

9<x<14 = how do I write this?

(9,14)

I thought I needed Brackets or such

Brackets are used for included endpoints.

(9,14) for 9 < x < 14
[9,14) for 9 <= x < 14
(9,14] for 9 < x <= 14
[9,14] for 9 <= x <= 14

To write the interval notation for the expression "9<x<14", you can use the round brackets () or square brackets [] to indicate whether the endpoints are excluded or included, respectively. Here's how you can represent it:

(9, 14)

Explanation:
- The parentheses () indicate that both 9 and 14 are excluded from the interval.
- The numbers 9 and 14 are referred to as the endpoints of the interval.
- The symbol "<" denotes that the values in the interval are greater than 9 and less than 14.

So, the interval notation "(9, 14)" represents all real numbers greater than 9 and less than 14.