Question about Texas Instruments TI-89 Calculator

# Can I enter a formula like this 5/500=2/x and get an answer.

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• Texas Instru... Master

Yes you can. Use the Solve( function. You will find it under Math

Posted on Sep 13, 2010

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Posted on Jan 02, 2017

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Just tell us what formula you must enter and we will show you how to enter it.

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### In Excel adding positive and negative numbers

Yes,

1. Select the column. (click on top of the column it will select)
2. Right Click and select Format Cells.
3. Select Currency in Category then press OK
Now just type your Numbers i.e. 571 for \$571 and -650 for -\$650 and sum using the normal way.

That is Select the Cells which you want to SUM and Press Alt+=

This will bring the total just below the selected cells.

Thanks
Iqbal

Apr 02, 2008 | Computers & Internet

Tip

### HOW TO COUNT THE OCCURRENCES OF A TEXT STRING

In the cell that you want the result to appear in, enter the appropriate formula from the following examples.
How to Count the Occurrences of a Number
Use this formula
=SUM(IF(range=number,1,0))
where range is the range that you want to search, and number is the number that you want to count.
NOTE: This formula must be entered as an array formula. To enter an array formula, press CTRL+SHIFT+ENTER.
How to Count the Occurrences of a Text String
Method 1
Use this formula
=SUM(IF(range="text",1,0))
where range is the range that you want to search, and text is the text that you want to find (the text must be enclosed in quotation marks).
NOTE: The above formula must be entered as an array formula. To enter an array formula, press CTRL+SHIFT+ENTER.
Method 2
Use the COUNTIF() function to count the occurrences of a text string. For example, use the formula
=COUNTIF(range,"text")
where range is the range of cells that you are evaluating, and text is the text string that you want to count instances of (note that text must be enclosed in quotation marks).
NOTE: This formula must be entered as an array formula. To enter an array formula, press CTRL+SHIFT+ENTER.
Wildcard characters can be used within the COUNTIF function.
The asterisk character (*) represents more than one character. For example, to count all the cells in the range a1:a10 that contain an "x," you can use the following formula:
=COUNTIF(a1:a10,"*x*")
The question mark character (?) can also be used to represent one wildcard character -- for example, to count all cells in the range whose second character is the letter, such as "ax" or "bx."
=COUNTIF(a1:a10,"?x*")

on Nov 11, 2013 | Microsoft Excel Computers & Internet

### Calculate formula

Fixya is an advice forum for do it yourself inclined people. We don't provide math or programming support. Try Yahoo answers or Justanswer.

Mar 17, 2017 | Office Equipment & Supplies

### If function with array

Here is an example:-
We have to calculate result on the basis of marks.
1. Select answer range and click in formula bar
2. Type following formula
=if(d5:D9>=40,"Passed","Failed")
3. Now Press CTRL+SHIFT+Enter key
4. Observe the result in answer range and formula in formula bar, notice { } braces come automatically when we press CTRL+SHIFT+Enter key for an array.
For more clarification please mail on ali_zulfikar@yahoo.com with screenshots.

Apr 13, 2014 | Microsoft Excel for PC

### How to make this operation in my texas instruments TI-30XA 3.55*10(to the 24)

Because this calculator does not allow you to enter formulas, you have to alter the formula a bit.

Instead of entering 3.55*10^24, enter (10^24)*3.55

Note: 10^24 is 10 to the 24.

Here is the procedure:
1) find 10^24. Do this by typing 10, pressing the yx button (which is right above the divide button), and then typing 24. Press the '=' button.

2) multiple the result by 3.55. Press the '=' button.

Nov 23, 2009 | Texas Instruments TI-30XA Calculator

### Sometimes when I use a formula in Excel 2003 it will not calculate - it is as if the formula does not exist. an additional problem is that when the formula works it will not calculate several columns if...

Make sure, when you entr a formula that you hit the ENTER key instead of just moving to tyour next cell. To have all numbers added or moved, use the"Special" application, or change the value. Such as -if you are working in text mode and you enter numbers, they are only numbers in text mode. They don't have a value. Correct the cells to reflect numbers. Right click, format cell - select what you want.

Nov 05, 2009 | Microsoft Office Excel 2003 for PC

### Need to know the formula for increasing a \$3500 revenue by 0.005% per month for 24 consequtive months. how do i preform this with one formula to avoid entering it 24 different times. i know that the answer...

If the column is absolute, then use the \$ before the first character and if the row is absolute use the \$ before the second character in your cell designation. If BOTH column and row are absolute, use the \$ before both the column and row character.

Examples: \$A1, A\$1, \$A\$1

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### Excel Formula

Make sure that the cell is formatted as a number, not as text. (Right-click the cell, format cell, number, choose NUMBER.)

Dec 19, 2007 | Microsoft Excel for PC

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