Put in your fraction (ex. 1/2+1/2)(use the divided by symbol for it) then add, subtract, or whatever. Then push the MATH button (underneath the ALPHA green button) hit enter then hit enter again and there is your answer. ex. 1/2+1/2>frac=1

Press [GRAPH] to see the graph, then press [2nd][PRGM] to enter the draw menu. If you scroll all the way to the bottom, you will see the Text( option; press ENTER. You can then type anywhere on the screen by using the arrows to move the cursor and then typing. Don't forget to press [2nd][ALPHA] before typing letters.

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More calculator assistance is available at [See related link below]

Press 2ND TEST (above MATH). Then use the left or right arrow key to select LOGIC at the top of the screen.

Turn the calculator on and press 2nd, + (MEM), 2:Delete, 7:Prgm. This shows a list of all programs with the cursor pointed at the first one. Use the up- or down-arrow keys to place the cursor in front of the one you want to delete, then press ENTER. Repeat for all programs that are to be deleted. Turn the calculator on and press 2nd, + (MEM), 2:Delete, 7:Prgm. This shows a list of all programs with the cursor pointed at the first one. Use the up- or down-arrow keys to place the cursor in front of the one you want to delete, then press DEL. The calculator will then ask if you're sure you want to delete, so press 2:Yes. Repeat for all programs that are to be deleted.

found @ http://www.math.tamu.edu/~lynnette.cardenas/del_prog.htm

If you don't have games already installed on the calculator, you need to install them. If you already have them on your calculator, you need to go to the PRGM button, and if it is not there, go to the APPS button. If it is not either place, go to 2nd, MEM (above either the plus sign or minus sign), Groups, and then press the right arrow key to end up at UNGROUP. Go down to the game that you put on your calculator and hit Enter. Then the game should install on your calculator. If you don't have the game installed on your calculator already, follow the directions below: First you download the game from a website, such as ticalc.org, read the readme if it came with one, and then you send it to your calculator. To send it to your calculator, you connect the calculator to your computer with a black cable that came with the calculator. Then you make sure the calculator is turned on, and right-click the files that you downloaded. Go to Send this file to TI device... and when the window opens, click Send. If you don't see Send this file to TI device... when you right-click the game, then you don't have TI Connect installed. Either download it from education.ti.com, or install it from the CD that came with the calculator. Questions, see education.ti.com.

• ALG1CH5: An app with algebra questions
• ALG1PRT1: An app with algebra questions
• App4Math (ZoomMath or Zoom App4Math): An app that makes math easier to read (such as real square root symbols with the numbers inside them)
• AreaForm (Area Formulas): An app with questions and information about areas of different shapes
• CabriJr (Cabri Junior): An app that allows the user to draw geometric shapes
• CelSheet (CellSheet): A spreadsheet, sort of like excel
• Conics: An app with formulas for conic sections (circles, ellipses, hyperbolas, and parabolas)
• CSheetDe: Spreadsheet app in German
• CSheetEs: Spreadsheet app in Spanish
• CSheetFr: Spreadsheet app in French
• CtlgHelp (Catalog Help): An app that will show the syntax (what to type, basically), for the different functions on the calculator
• Dansk: An app that will make the calculator "speak Danish"
• Deutsch: An app that will make the calculator "speak German"
• EasyData: An app that helps with transferring data to and from the calculator

• Español: An app that makes the calculator "speak Spanish"

• Français: An app that makes the calculator "speak French"

• FunSci (Fundamental Topics in Science): An app with basic information about science and a link to SciTools

• Inequalz (Inequality Graphing): An app that allows the calculator to graph inequalities

• LearnChk (LearningCheck): An app that allows for the creation of test forms on the calculator, more or less

• Nederlan (Nederlands): An app that makes the calculator "speak Dutch"

• OrganEsp: Organizer in Spanish

• OrganFra: Organizer in French

• Organize (Organizer): Organizer with address book, calendar, and task list

• Perioden: Periodic table in German

• Periodic: Periodic Table

• PlySmlt2: Polynomail root finder and simultaneous equation solver

• PuzzPack (Puzzle Pack): An app with four puzzle games, including "Block Dude"

• Périod: Periodic table in French

• SciTools (Science Tools): An app with a sig-fig calculator, unit converter, data/graphs wizard, and vector calculator

• SciToolsEs: Science Tools in Spanish

• SciToolsFr: Science Tools in French

• StCrdDeu: StudyCards in German

• StCrdEsp: StudyCards in Spanish

• StCrdFra: StudyCards in French

• StudyCrd (StudyCards): Allows viewing of electronic flash cards created with the PC software Study Cardsâ„¢ Creator Software

• Svenska: makes the calculator "speak Swedish"

• Tabla P: Periodic table in Spanish

• Transfrm (Transformation Graphing): With this app turned on, variables other that X in equations (which are treated as constants by the TI-84 Plus Silver) can be set directly from the graph screen

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Press MATH then 9 (fnInt() enter the function comma enter the variable comma enter the lower bound comma enter the upper bound

For Microsoft Office Excel 2003:

1) Click Tools

2) Click Data Analysis*

3) Click Regression

4) Input values and check "Residual Plots"

5) Click OK

For Microsoft Office Excel 2007/2010/2013:

1) Click Data

2) Click Data Analysis*

3) Click Regression

4) Input values and check "Residual Plots"

5) Click OK

*Note: This may require installing the Analysis Toolpak.

For Microsoft Excel 2003:

1) Click Tools

2) Click Add-Ins

3) Check "Analysis ToolPak"

4) Click OK

For Microsoft Excel 2007/2010/2013:

1) Click Office Button (upper left-hand corner of screen)

2) Click Excel Options

3) Click Add-Ins

4) Click "Analysis ToolPak"

5) Click OK

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Press the APPS button. You will see a list of all the applications that are currently on the TI-84 plus. Use the arrow keys to scroll down to the one you want to use and then press ENTER.

You open your Apps, which should be the purple button, and then you open inequalz, from there you can put in your inequalities and then hit graph and it will come up on screen.

This is probably because one of your stat plots is trying to use two lists that aren't the same length. If you are not using stat plots, then press Y= and deselect all the plots at the top. (For example, to deselect Plot1, press the up arrow key until it is highlighted and then press ENTER.)

If you are using stats plots, check to make sure that the lists being used are the same length and that they have at least one item in them. (You can see what lists are being used and set what lists are being used by pressing 2ND STAT PLOT [above Y=]. You can edit lists by pressing STAT and then selecting Edit...)

The invalid dimension error can also happen if you try to invert a matrix that is not a square matrix, (for example, a matrix with dimensions 2 x 3). Matrices can only be invented if they are square (for example, a matrix with dimensions 3 x 3).

I'll assume you mean TI-83+, as the TI-83 cannot archive programs. On the TI-83+, archived means that a program, list, equation, picture, or other item is stored in the calculator's Flash memory instead of its RAM. This can be used so that the item does not get erased when the RAM is cleared, or to reclaim free RAM for other programs and files. However, archived items cannot be executed or modified, so they must be unarchived first.

More calculator assistance is available at the related link "Cemetech" below.

:Input "X1",A

:Input "X2",B

:Input "Y1",C

:Input "Y2",D

:(D-C)/(B-A)->E

:Disp "SLOPE:",E

there isn't one.

Press the Y= button and type 'X+2' (not the quotes) next to Y1 (or any other Y will work). Then press GRAPH.

(To type X, press the X,T,θ,n button. If you don't see Y1= when you press Y=, press MODE and select FUNC, then try again.)

There are many random functions on a TI-84 calculator. Find them by pressing MATH, and choosing PRB at the top.

Use rand to generate a random number between 0 and 1.

Example; to generate a random number between 0 and 1, type:

rand

Use randInt( to generate a random integer between 2 integers (inclusive))

Example; to generate a random integer between 1 and 10 (including 1 and 10), type:

randInt(1,10)

Use randNorm( to generate a random number that is close to a certain number.

randNorm(x,y) will generate a number that is 95% certain to be within 2*y of x.

Example; to generate a random number that is 95% certain to be with 2*(.01) of 7, type:

randNorm(7,.01)

Use randBin( to simulate a certain number of trials based on their success rate.

randBin(x,y) will generate the number of trials of success rate y that succeeded if x trials were run. y must be a percent written as a decimal, so it must be between 0 and 1.

Example; to simulate how many trials will succeed if 50 trials are run with a success rate of 75%, type

randBin(50,.75)

An additional number can be added to tell the calculator to generate more than 1 number and put them in a list. These will run the command 5 times and make a list:

rand(5)

randInt(2,9,5)

randNorm(4,.1,5)

randBin(30,.25,5)

Graph the two lines or equations you want to find the intersection of. Then adjust the window so that you can see the intersection point. (If you don't know where it is, try pressing ZOOM and choosing ZoomFit.) Then press 2ND CALC (above TRACE) and choose option 5, intersect. Use the up and down arrows to select the first equation you want to find the intersection point on, and press ENTER. Do the same thing for the second equation. The calculator will now say "Guess?". Use the left and right arrows to move the x-like shape as close to the intersection point as possible, then press ENTER. The calculator will tell you the intersection point and the bottom of the screen.

If you get a NO SIGN CHNG error, then it might be because the intersection point is not on the screen. Change the window so that you can see the intersection point and try again. Also, make sure that your guess is somewhat close to the intersection point.