Press 2ND TEST (above MATH). The less than sign should be the fifth option.
Press 2ND TEST (above MATH). Less than or equal to is the 6th option.
The TI-85 was the second graphing calculator made by Texas Instruments. (The first was the TI-81). The TI-84 is a much newer version and has more functionality and memory. The only real advantage that the TI-85 has over the TI-84 is that it costs less. As far as where you are allowed to use the calculator, almost every test or class that allows a TI-85 will allow a TI-84 as well. The TI-84 is a much better investment. (If the TI-84 is too expensive, look into getting a TI-83. This model is also newer than the TI-85.)
Yes.
The equal sign is the same as the enter button
Use (2nd)(MATH) to access these, and from this menu you have the =,>,<,etc.
The TI-89 is the better calculator. It has more functions than the TI-84, but is also more complex. Each is better for different situations or skill levels with calculators.
The TI-84 is a graphing calculater. It is mostly just an update to the TI-83 calculater.
Yes, the TI-84 is allowed during the ACT.
Unfourtunately, it is not possible to expand with the TI-84. Only the TI-89 can expand polynomials.
Sorry, but no, to my knowledge there are no shells for the TI-84=CSE, and there probably will never be, the last descusions about being in 2006, and the TI-84+CSE is not compatible with the old TI-84 or even TI-84+SE programs. I am sorry to say but you will never have complicated games for this edition of the TI calculators but there are some simple games that don't need shells, such as tetris, worms etc:
You can play Ti-84 games with the 84 keypad but I have yet to find games for the n-Spire CAS. So just download TI-84 games and use the 84 keypad.
mram ti 84 sequences