Linear Equations

Sunday, 28 December 2014

Today, try solving a system of linear equations using matrix operations for it, from the formulas.

We used MINVERSE function, which we get the inverse matrix and MMULT function, obtaining with it the result of multiplying two matrices.

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Solver - Solving Linear Equations

Saturday, 27 December 2014

Linear equations are the most algebraic expressions used in different fields of science, from engineering through the science of human behavior to reach medical areas . 

A linear equation receives this name because when we get on a plane to graph results in the graph of a straight line. 

We linear equations with two or more variables the representation of these equations can be: 

• Two variables -      3x + 2y = 8 
• Three variables -   3x - 5y + 6z = -10 
• Four variables -     w - 9x + 5y - 8z = -15

To solve a system of linear equations, we need to have the same number of equations and variables, that is, if I have a system of two variables , I need two equations to solve , if I have three variables , I need three equations and so on.

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Excel no longer expects

Friday, 26 December 2014

This is a very stupid thing. Suddenly no longer expects Excel , when you type something .
Probable Cause: The automatic calculation has been turned off .

Remedy:

A) Up Excel 2003
About menu Tools -> Options - > Up tab Calculation - there select Automatic

B) From Excel 2007 Version 1:

Top left clicking on the Excel button in the dialog below right click Excel Options .
Select it, the following dialog formulas left .
Then select Automatic right in workbook calculation.

Version 2:
In the ribbon, select the tab formulas.
Click Turn right calculation options .
Then tick Automatic.

Possible causes:

1. accidentally changed itself
2. Irdenein Dödel has disconnected them about these macros and forget to turn
3. Other ...

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Disappeared scrollbars

Thursday, 25 December 2014

This is a very stupid thing. Suddenly no longer expects Excel when you type. 

Probable cause: The automatic calculation has been turned off. Remedy: A) Up Excel 2003 About menu Tools -> Options -> Up tab Calculation - there select Automatic B) From Excel 2007 

Version 1 : Top left clicking on the Excel button in the dialog at the bottom right click Excel Options. Select it, the following dialog left formulas. Then select Automatic right in workbook calculation.

Option 2: Select In the Ribbon tab formulas. click Turn right calculation options. 
Then automatically hook. Possible causes: first Even accidentally changed . 2 Irdenein Dödel have them switched off and on again forget about these macros . 3 Other ... 

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Disappeared scrollbars

You can no longer on the spreadsheet up and down or left and right with the scroll bar to move, because that's just gone at once. Gone - vanished into thin air - Fort as nothing ... Remedy: A) Up Excel 2003About the Tools menu - there select the bottom right horizontal and vertical scroll bars -> Options -> Top View tab. B) From Excel 2007 links at the top of the Excel button click, then in the dialog at the bottom right click Excel Options. Select it, the following dialog left Advanced. Then right as far down until youshow options for this workbook see. each set below this heading horizontal and vertical scroll bars a check mark. 

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How to delete street number from address

Monday, 13 October 2014

How to delete street number from address

=IF(ISERR(--LEFT(A1,FIND(" ",A1))),A1,MID(A1,FIND(" ",A1)+1,100))

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How to Separate street number from address

=IF(ISNUMBER( VALUE(LEFT(A1,1))), LEFT(A1,SEARCH(" ",A1)-1), "")

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How to Edit Formulas in Microsoft Excel 2010

Friday, 19 September 2014

How to Edit Formulas in Microsoft Excel 2010

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