Hello, my name is Michiko Bursey, and I dropped by TI-84 graphing calulator. It still gives out correct answers to solved math and chemistry problems, but sometimes a small or medium ink blot (blue) appears on the square screen. Do I need to replace my TI-84 graphing calulator? I am trying to hold on to this one because the TI-84 is expensive to replace. Some people suggest that I throw it away. Thank you Michiko Bursey

amazing - all I did was search for ti84 studycrd and look what I found. The question is why couldn't you do it? Maybe you need to switch to a 4 fct unit.
TI-84 StudyCard app - techpoweredmath.com https://www.techpoweredmath.com/ti-84-studycard-ap/
TI-84 StudyCard app. The Texas Instruments website has a huge number of studycard stacks that cover every subject, not just math. You'll find every kind of math stack you could think of too. They include topics as varied as multiplication facts, graphs of common functions, to calculus definitions and trig identities.

You can't simply enter 7x+9=30 into the calculator, there is a way to calculate what the x is but its been a few years since I've done these..

To clean the slate so to speak, just reset the RAM.

1. Press [2nd][+] to access the (MEM)ory management function
2. Press [7:Reset]
3. Press [1:All Ram]
4. Press [2:Reset]
5. Press [CLEAR] to erase the "RAM cleared" Message

Calc

hello sir, Press "second" "math", and it should be the first thing listed. If you need other commands hit "second" "0" that will enter the catalog and you can press any letter (without hitting alpha) to jump to that letter in the list. Please click on the following link to see the manual of the TI-84 Plus Calculator: http://education.ti.com/guidebooks/graphing/84p/TI84PlusGuidebook_Part2_EN.pdf
kindly rate me.. thanks for using fixya..

Hello,
Turn the satistical plots OFF
Press [2nd][Y=] (STATPLOT). Select or enter 4: to execute the command [PlotsOff] [ENTER]

Clear the lists (statistical lists)
Press [2nd][0] (Catalog]. Press [PGRM] C. The cursor jumps to the first command in catalog that starts with C (The greek letters in names do not matter). Scroll down a bit to reach the command [ClrAllLists]. Select it and press [ENTER].

Try your graphs again.
If you still have problems, just reset the RAM:
Press [2nd][+] (MEM). Press 7 to select [Reset] then [1:All Ram][2:Reset]. Press [Clear] to erase the Ram Cleard message.

Now you should be able to draw the graphs.

Hope it helps.
Thanks for using FixYa.

Hello,
Contact [email protected] or www.ti.com/calc .
Hope it helps

About the only other solution I can think of is to take out the backup battery if you haven't already done so. Might work.

I use one of the graphing APPS or do through a program. I have a users manual for TI 84 silver Edition that shows you how to archive\ unarchive to run programs here at this site. Usually, I tell people to just forget about the programs and use the simple concepts so, that they could operate their calculator better. But, if you notice in those program are actually more powerful than the programs you get on the web, because I wrote them to be flawless, or I only used programs that I knew would not clash and were very well written. Won't y1=(2/5)x-(11/5) and -3x+8 work?

y1=(2/5)x-(11/5) and -3x+8

Basically you first have to put your answer into scientific notation by pressing the 3rd key then the 6 key. The screen display should change to one big zero and two small zeros.

I was workinggon the same problem with a -log of a chemistry problem to get pH and I knew the answer because I calculated it on it TI-85, but we are not allowed to use graphing calulators on the exam (:-((() so I had to figure out how to do it on this one!

For example, I had pH =-log(2.828947x10^4)

On the TI-36X you change to scientific notation using the instructions above. Once the three zeros enter on the screen:
[4]
[-]
[2nd]
[10^x]

1^-04 should appear on screen, then you multiply by 2.828947

[x]
[2][.][828947]
then your screen will show the answer in scientific notation.

2.828947 in big numbers and in small numbers -04
From there you simply press:
[log]
and your answer will show up as a negative number. Just take the absolute value of that and you have your answer. Took me like 30 minutes the night before a huge chemistry exam to figure that out! Hope it helps someone!

go to:


mode
select DEGREE rather than RADIAN three lines down.