Question about Texas Instruments TI-84 Plus Calculator

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Problem with adding values by highlighting previous solutions

When i have a number of previous answers that i want to "grab" to add, i am having a problem. i will explain with numbers if i have: 111 222 333 i want to add them, so i scroll up and press enter, so that 111 is entered on my line. then i add a + sign and scroll up to highlight 222 and press enter. so far i have 111+222 which is fine. but if i press + and then highlight 333 and press enter, it inserts itself in the wrong place, so that i get 113331 + 222. this seems to be only a problem if the numbers i am trying to add are large.

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Have you considered to store your important results for future use. To store a result needed for future calculations press the STO> button then ALPHA then the letter where you want to store the number.
Example: 111 STO> SHIFT A ENTER
222 STO> ALPHA B ENTER
333 STO> ALPHA C ENTER

To add them use the RCL key
SHIFT RCL ALPHA A +SHIFT RCL ALPHA B+SHIFT RCL ALPHA C ENTER

Posted on Dec 13, 2012

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SOURCE: Graphing Problem -URGENT-

The problem is causedby an application called "Inequalz".
To solve the problem, go to the Apps menu and select Inequalz,
then select "quit Inequalz".
This should solve the problem.

Gr. Marijn

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SOURCE: TI 84 will not graph multiple functions simultaneously

Turn off transformers. Go to apps and go all the way down until you reach transformers then hit enter. Then a menu should appear and hit uninstall that should fix it.

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I love that old, little calculator, the TI-1795+ (not the new one, SV).
Does anyone know where to get any more of these. I'd buy a few,
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and years and years. They still work fine.

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SOURCE: graphing problem

YES!  I found out how, but you have to reset everything on your calculator unfortunately clearing out all of your applications and memory.  Here is what you do:
Press 2ND Press + Press 7 Press the right key twice Press Enter Press 2
This looks like it won't do anything but it DOES I'm so happy now!

Posted on Mar 24, 2009

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SOURCE: Entering ln x, and plugging a number in for x value.

Having gone over a month with no response, I assume this is no longer a problem.

Posted on Jun 07, 2010

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1 Answer

WHAT IS THE MEAN DEVIATION FOR 121 122 123 124 125 126?


Hello Dear

Mean deviation is calculated by the following steps:

1. Add all the numbers and then divide by total number of values. That is take a mean.
2. Then subtract the mean from each values and ADD them all
3. then the added answer must be divided by the total number of values. and you get the Mean devaition.

I solved your problem here in steps:

Step 1:
(121+122+123+124+125+126) / 6 Equals to 102.6

Step 2:

(121-102.6) + (122-102.6) ...... +(126-102.6)
=125.4

Step 3:

125.4/6 = 20.9 is the MEAN DEVIATION


Hope so this will help you.
Please dont forget to rate the solution.

regards

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