How do I make it solve a "combined inequality"?

[exon111]

I can't figure out how to make my Ti-89 Titanium sove a combined inequality. I can't find it anywhere in the Pdf manual.


Example 5x-2?2x<3

I tried solving it like a regular inequality "solve(5x-2>2x, x)" which equals "x?2/3", but when I try "solve(5x-2?2x<3, x)" it says "Missing )"

REVISION: I just previewd this post and found that the the > or equal to symbol has been replaced with a question mark. I gues the forum doesn't support those symbols. Pretend it says >or equal to instead of the ? marks.

If anyone know how to solve this I would appreciate it.

Thanks,
Tilden (10th grade)
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"Expect my questions to be basic and stupid, I'm only in high school algebra 2 and I am bad at math "

[baseballdude_]

WOW! I JUST looked this up myself. I'm assuming you're talking about piecewise functions. You're going to use the When() function. Check out this link:

http://www.math.lsu.edu/~neal/TI_89/graphing/special_graphs/piecewise/piecewise.html

[exon111]

Thanks for replying so quickly, but that isn't what I meant. That is way past my limited knowledge of math at this point. I am in chapter 2 of my highschool algebra 2 book. My question is about combined inequalites. If you go to http://www.gomath.com/htdocs/lesson/inequality_lesson1.htm it explains combined inequalities on the lower part of the page. It's realy simple, I just don't know how to make the calculator simplify it.

If it helps, another example problem would be "-1>2r-5>-9". I need it to simplify. The answer for the aforementioned example should be "r: -2<r<2", according to the answers in the back of the book (Algebra and Trigonometry, Structure and Method, Book 2).

If I could just get it to simplify the problem for me I would be happy, but if anyone knows how to make it graph it I would like to know how.
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"Expect my questions to be basic and stupid, I'm only in high school algebra 2 and I am bad at math "

[baseballdude_]

Oh...I'm sorry...I completely misunderstood. I'm not sure how to do that on the calculator either - just always did it in hand. Hopefully someone knows, I'd be interested in knowing as well.