Solution 12126: Correcting a Non-algebraic Variable in Expression Error on the TI-89 Family and Voyage™ 200 Graphing Calculators.
... stored): 1) Press [CATALOG] then press the [,] key to go to the alphabetical listings beginning with the letter D2) Scroll down to select the DelVar command and press [ENTER]3) Input the variable used in the problem (For example, if the variable in the problem is x, then input DelVar x4) Press [...https://education.ti.com/en/customer-support/knowledge-base/other-graphing/troubleshooting-messages-unexpected-results/12126
Solution 12074: Troubleshooting a TI-89 that Displays Line 1111 Emulator.
Solution 12074: Troubleshooting a TI-89 that Displays Line 1111 Emulator. Solution 12074: Troubleshooting a TI-89 that Displays Line 1111 Emulator. global Solution 12074: Troubleshooting a TI-89 that Displays Line 1111 Emulator. website ...https://education.ti.com/en/customer-support/knowledge-base/other-graphing/troubleshooting-messages-unexpected-results/12074
Solution 12252: Calculating the Log and Inverse Log of a Number Using the TI-30X IIS/B.
... Knowledge Base Search How do I calculate the log and inverse log of a number using the TI-30X IIS/B? On the TI-30X IIS/B the [LOG] key computes the common logarithm of a number. To compute the common antilogarithm of a number, use the 10x function. The examples below will demonstra...https://education.ti.com/en/customer-support/knowledge-base/scientific-elem-calculators/product-usage/12252
Solution 37335: Troubleshooting a TI-89 family, TI-92 family or Voyage 200 Graphing Handheld That Will Not Turn On or Function Properly.
Solution 37335: Troubleshooting a TI-89 family, TI-92 family or Voyage 200 Graphing Handheld That Will Not Turn On or Function Properly. 92 is not turning on, My Voyage 200 not functioning Solution 37335: Troubleshooting a TI-89 family, TI-92 family or Voyage 200 Graphing Handheld That Will Not...https://education.ti.com/en/customer-support/knowledge-base/other-graphing/troubleshooting-messages-unexpected-results/37335
Solution 10482: Discontinued Texas Instruments (TI) Graphing Calculators.
Solution 10482: Discontinued Texas Instruments (TI) Graphing Calculators. Discontinued Texas Instruments (TI) Graphing Calculators. Which graphing calculators have been discontinued? Solution 10482 Discontinued Texas Instruments TI Graphing Calculators discontinued, graphing calculators, calcul...https://education.ti.com/en/customer-support/knowledge-base/scientific-elem-calculators/general-information/10482
Solution 37336: Troubleshooting a TI-73 Family, TI-80, TI-81, TI-82, TI-83, TI-85, TI-85 and TI-86 Graphing Calculator That Will Not Turn On or Function Properly.
37336 Troubleshooting a TI-73 Family, TI-80, TI-81, TI-82, TI-83, TI-85, TI-85 and TI-86 Graphing Calculator That Will Not Turn On or Function Properly. Handheld, calculator, not turning on, "graphing calculator not working", troublehooting, Will not turn on, Solution 37336: Troubleshooting a T...https://education.ti.com/en/customer-support/knowledge-base/other-graphing/troubleshooting-messages-unexpected-results/37336
Solution 10477: Replacing and Installing the Batteries in a TI-35X.
...edge Base Knowledge Base Search How do I replace and install the batteries in a TI-35X? The TI-35X uses two A-76 batteries. Comparable battery model numbers include:Duracell® D357Eveready® 357To replace the batteries:• Turn the calculator off. • Place a small screwdriver...https://education.ti.com/en/customer-support/knowledge-base/scientific-elem-calculators/general-information/10477
Solution 35615: Replacing the Battery in a TI-36X Pro Scientific Calculator.
...into place. 6) Press [On]+[Clear] at the same time to reset the calculator. Please Note: When replacing the battery, avoid any contact with the other components of the calculator. For more information regarding your Texas Instruments calculator, please refer to the guidebooks section. If your cal...https://education.ti.com/en/customer-support/knowledge-base/scientific-elem-calculators/general-information/35615
Solution 12282: Changing the Angle Mode Setting on the TI-34 II Explorer Plus™.
Solution 12282: Changing the Angle Mode Setting on the TI-34 II Explorer Plus™. Solution 12282: Changing the Angle Mode Setting on the TI-34 II Explorer Plus™. global Solution 12282: Changing the Angle Mode Setting on the TI-34 II Explorer Plus™. website ...https://education.ti.com/en/customer-support/knowledge-base/scientific-elem-calculators/product-usage/12282
Solution 34692: Using the Statistics Wizard on the TI-84 Plus Family of Graphing Calculators.
...tive. To enable and disable the wizard format by going to [Mode] and change the option for Stat Wizard: ON or OFF. To access any of the statistics commands, press [Stat] then [→] to CALC and then select a statistics command and the screen will show a wizard similar to what is listed below: Pl...https://education.ti.com/en/customer-support/knowledge-base/ti-83-84-plus-family/product-usage/34692
Solution 12223: Calculating Mark-Up, Gross Profit Margin, and Percent Change on the TI-5018.
Solution 12223: Calculating Mark-Up, Gross Profit Margin, and Percent Change on the TI-5018. Solution 12223: Calculating Mark-Up, Gross Profit Margin, and Percent Change on the TI-5018. global Solution 12223: Calculating Mark-Up, Gross Profit Margin, and Percent Change on the TI-5018. we...https://education.ti.com/en/customer-support/knowledge-base/scientific-elem-calculators/product-usage/12223
Solution 34620: Finding the Discriminant of a Quadratic Equation on the TI-83 Plus and TI-84 Plus Family of Graphing Calculators.
...and TI-84 Plus family of graphing calculators do not have the built-in function to find the discriminant. However, the instructions below show how to compute the discriminant by using variables: The discriminant is a number that can be calculated from any quadratic equation. A quadratic equation...https://education.ti.com/en/customer-support/knowledge-base/ti-83-84-plus-family/product-usage/34620
Solution 34603: Finding the X-Intercept of a Function on the TI-83 Plus and TI-84 Plus Family of Graphing Calculators.
...find the x-intercepts of a function on the TI-83 Plus and TI-84 Plus family of graphing calculators? To find the x-intercepts of a function, the zero command must be used. Follow the example below for help with using the zero command. Example: 2X - 7 1) Press [Y=] to access the Y= Editor. 2) Pr...https://education.ti.com/en/customer-support/knowledge-base/ti-83-84-plus-family/product-usage/34603
Solution 12320: Changing the Decimal Setting on the TI-30X IIB / TI-30X IIS and TI-34 II Explorer Plus™.
Solution 12320: Changing the Decimal Setting on the TI-30X IIB / TI-30X IIS and TI-34 II Explorer Plus™. Solution 12320: Changing the Decimal Setting on the TI-30X IIB / TI-30X IIS and TI-34 II Explorer Plus™. global Solution 12320: Changing the Decimal Setting on the TI-30X IIB / TI-30X ...https://education.ti.com/en/customer-support/knowledge-base/scientific-elem-calculators/product-usage/12320
Solution 34733: Performing Degrees, Minutes, Seconds (DMS) Conversions on the TI-83 Plus and TI-84 Plus Family of Graphing Calculators.
...] [APPS] to access the ANGLE menu, then press the [4] key to select the ►DMS function (convert to degrees, minutes, seconds). • Press [ENTER] to complete the conversion process. Below is an example of how to convert a number from degrees, minutes, seconds to decimal degrees. Example: Con...https://education.ti.com/en/customer-support/knowledge-base/ti-83-84-plus-family/product-usage/34733
Solution 26450: Changing the +/- sign of an answer on the TI-30X IIS and TI-30X IIB.
Solution 26450: Changing the +/- sign of an answer on the TI-30X IIS and TI-30X IIB. Solution 26450: Changing the +/- sign of an answer on the TI-30X IIS and TI-30X IIB. global Solution 26450: Changing the +/- sign of an answer on the TI-30X IIS and TI-30X IIB. website ...https://education.ti.com/en/customer-support/knowledge-base/scientific-elem-calculators/product-usage/26450
Solution 12304: Calculating Mode and Median on the TI-36X Solar.
...ical data? The TI-36X Solar does not perform statistical analysis that will return the median and mode from a list of data. This calculator will only compute for the following variables:MeanSimple standard deviationPopulation standard deviationSum of data valuesSum of squares (of data values)Numb...https://education.ti.com/en/customer-support/knowledge-base/scientific-elem-calculators/product-usage/12304
Solution 12162: Symbolic Derivative Example Using the TI-89 Family, TI-92 Family, and Voyage™ 200 Graphing Calculators.
...yntax for d() is below:d(expression,variable[,order])Returns the first derivative of expression with respect to variable. The optional argument and accompanying comma are enclosed in brackets. If included, order must be an integer. If the order is less than zero, the result will be an anti-deriva...https://education.ti.com/en/customer-support/knowledge-base/other-graphing/product-usage/12162
Solution 12160: Storing Formulas in the TI-89 Family, the TI-92 Family, and Voyage™ 200 Graphing Calculators.
...aximum of 11 equations only can be stored in the Numeric Solver. Write a Program: Writing a program requires knowledge of the different programming commands and their syntax. The calculator guidebook contains an alphabetical list of operations section that gives all the commands and the proper ...https://education.ti.com/en/customer-support/knowledge-base/other-graphing/product-usage/12160
Solution 12159: Solving Systems of Equations Using Symbolic Manipulation on the TI-89 Family, TI-92 Family and Voyage™ 200 Graphing Calculators.
.../2 To copy the equation press [F1] and select 5:Copy. Paste the calculated expression for x on the entry line by pressing [F1] and 6:Paste. Your command line should read: solve(-x+7y=-12,y)|x=(3y+4)/2 • Press [ENTER] and the screen will display y=-20/11. • Press the up arrow key to...https://education.ti.com/en/customer-support/knowledge-base/other-graphing/product-usage/12159
Solution 12164: The Ceiling() Function on the TI-89 Family, TI-92 Family, and Voyage™ 200 Graphing Calculators.
...ing calculators? The ceiling() function returns the nearest integer that is greater than or equal to its argument. The argument can be a real number, complex number, list, or matrix. Examples: 1. If you enter in ceiling(0.456) , it will return 1 as the answer 2. If you enter in ceiling({-3.1,1...https://education.ti.com/en/customer-support/knowledge-base/other-graphing/product-usage/12164
Solution 12158: Solving System of Equations Using TI-89 Family, TI-92 Family and Voyage™ 200 Graphing Calculators.
... access the Math worksheet2) Scroll down to #4 for Matrix and press the right arrow key3) Scroll down to #5 and press [ENTER] to paste simult( on the command line4) The syntax would then be:simult ([3, 3, -4; -1, 2, 5; 8, 4, -7],[-3; 18; -5])Please Note: Two matrices are actually entered: a three...https://education.ti.com/en/customer-support/knowledge-base/other-graphing/product-usage/12158
Solution 12169: Typing Lower Case and Upper Case Letters on the TI-89 Family, TI-92 Plus, and Voyage™ 200 Graphing Calculators.
... applications, such as going from the Text Editor to the Home screen. On the TI-89 family, while either type of alpha-lock is on: • To type a period, comma, or other character that is the primary function of a key, alpha-lock must be turned off. • To type a second function character such as [2nd]...https://education.ti.com/en/customer-support/knowledge-base/other-graphing/product-usage/12169
Solution 12156: Scaling the X-axis and Y-axis with the Same Units on TI-89 Family, the TI-92 Family, and the Voyage™ 200.
... when graphing a function on TI-89 family, the TI-92 family, and the Voyage 200? To make the scale on the x-axis and y-axis the same, use the ZoomSqr command. The ZoomSqr command displays the graph screen, adjusts the x or y window settings so that each pixel represents an equal width and height ...https://education.ti.com/en/customer-support/knowledge-base/other-graphing/product-usage/12156
Phosphate Analysis
One method of measuring the phosphate concentration is by using a Colorimeter. This instrument measures the amount of light transmitted through a sample at a given wavelength. The amount of light absorbed is mathematically related to the concentration of the solution.https://education.ti.com/en/activity/detail/phosphate-analysis