MAT isn't appearing when i press options.

You must be in the RUN screen.

Press Menu

Press 1:Run

Press OPTN

Under tab F2:Mat you get the MAT tab.

To invert a non-singular matrix A (a matrix with non-zero determinant) you, on the command line type in

Mat A then press the [x^-1] key. The [x^-1] is the shifted function of the right parenthesis.

Posted on Mar 25, 2014

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Posted on Jan 02, 2017

You can jump to the end of the post for you answer**. **

A. Define the matrix (Create it)

Turn calculator ON.

Press Menu,select the MAT icon and press [EXE]

You see a list of possible matrix labels (A, B, C,D,E,F)

All that have not been created have a "none" to their right

Highlight a matrix name and press the right arrow. Where there was "none" , you have a template 0x0.

That is where you specify the dimensions (mxn). exemple. 2x2

Enter the first dimension and press [EXE]

Enter the 2nd dimension and press [EXE]

A matrix template opens where you enter the coefficients left to right and up down.

After each coefficient press [EXE]. Cursor moves to the next coefficient, etc.

At the bottom of the screen you have 3 menus for Row and column manipulations. But those will have to wait for now.

Press [SHIFT][QUIT] to return to the list of matrices to create new ones

**B. Operations on matrices**

Once you have one matrix, you can do operations on it: Calculate the determinant (if matrix is square), calculate its inverse, transpose, augment it, fill it, etc..

These operations are accessed as follows.

Quit the matrix editor by pressing [Menu] and selecting the [Run] application.

Press [OPTN][F2:MAT]

You have the menus Mat,M(atrix)->L(ist), Det(erminant), Trn (transpose), Aug(ment) ->, Iden(tity),Dim(ension) Fill

Exemple : calculate the determinant of a matrix A (already defined).

You press the [OPTN][F2:MAT] key sequence (just above)

Press [F3:Det]; the command det is displayed on screen.

Press [F1:Mat] the identifier Mat is displayed.

Press [ALPHA] A; screen display det Mat A.

Press [EXE] to get the value of the determinant.

**C. Square of Matrix A**

[OPTN][F2:MAT] (MAT) [Alpha] A ^2 [EXE]

**D. Product of two compatible matrices MatAXMatB**

[OPTN][F2:MAT] (MAT) [Alpha] A [*] (MAT) [ALPHA] B [EXE]

**E. Calculate the inverse of a square matrix** (Mat A)

Use commands like the ones above to display the command**Mat A**, the press the [x^-1] key. You will get the inverse if matrix can be inverted.

A. Define the matrix (Create it)

Turn calculator ON.

Press Menu,select the MAT icon and press [EXE]

You see a list of possible matrix labels (A, B, C,D,E,F)

All that have not been created have a "none" to their right

Highlight a matrix name and press the right arrow. Where there was "none" , you have a template 0x0.

That is where you specify the dimensions (mxn). exemple. 2x2

Enter the first dimension and press [EXE]

Enter the 2nd dimension and press [EXE]

A matrix template opens where you enter the coefficients left to right and up down.

After each coefficient press [EXE]. Cursor moves to the next coefficient, etc.

At the bottom of the screen you have 3 menus for Row and column manipulations. But those will have to wait for now.

Press [SHIFT][QUIT] to return to the list of matrices to create new ones

Once you have one matrix, you can do operations on it: Calculate the determinant (if matrix is square), calculate its inverse, transpose, augment it, fill it, etc..

These operations are accessed as follows.

Quit the matrix editor by pressing [Menu] and selecting the [Run] application.

Press [OPTN][F2:MAT]

You have the menus Mat,M(atrix)->L(ist), Det(erminant), Trn (transpose), Aug(ment) ->, Iden(tity),Dim(ension) Fill

Exemple : calculate the determinant of a matrix A (already defined).

You press the [OPTN][F2:MAT] key sequence (just above)

Press [F3:Det]; the command det is displayed on screen.

Press [F1:Mat] the identifier Mat is displayed.

Press [ALPHA] A; screen display det Mat A.

Press [EXE] to get the value of the determinant.

[OPTN][F2:MAT] (MAT) [Alpha] A ^2 [EXE]

[OPTN][F2:MAT] (MAT) [Alpha] A [*] (MAT) [ALPHA] B [EXE]

Use commands like the ones above to display the command

Apr 27, 2012 | Casio FX-9860G Graphic Calculator

Here is enough to get you started and a little more.

Read the post ant consult your calculator manual. The screen captures below may not look exactly as your calculator but the steps are identical.

**A. Define a matrix (Create it)**

**B Operations on matrices**

Once you have one matrix, you can do operations on it: Calculate the determinant (if matrix is square), calculate its inverse, transpose, augment it, fill it, etc..

[OPTN][F2:MAT] (MAT) [Alpha] A ^2 [EXE]

D. Product of two compatible matrices MatAXMatB

[OPTN][F2:MAT] (MAT) [Alpha] A [*] (MAT) [ALPHA] B [EXE]

Part E Invert a (square, non singular) matrix that was already defined.

Press [OPTN] [F2:Mat] to open a screen similar to the one in capture above

Press [F1:Mat] to have identifier Mat displayed.

Enter the name of the matrix by pressing [ALPHA] A, for example.

Press [SHIFT] [ ) ] activate the (x^-1) key.

This is what you might see (with parentheses and without).

Press [EXE] button to calculate the inverse.

Read the post ant consult your calculator manual. The screen captures below may not look exactly as your calculator but the steps are identical.

- Turn calculator ON.
- Press Menu,select the MAT icon and press [EXE]
- You see a list of possible matrix labels (A, B, C,D,E,F)
- All that have not been created have a "none" to their right
- Highlight a matrix name and press the right arrow. Where there was "none" , you have a template 0x0.
- That is where you specify the dimensions (mxn). example. 2x2
- Enter the first dimension and press [EXE]
- Enter the 2nd dimension and press [EXE]
- A matrix template opens where you enter the coefficients left to right and up down.
- After each coefficient press [EXE]. Cursor moves to the next coefficient, etc.

Once you have one matrix, you can do operations on it: Calculate the determinant (if matrix is square), calculate its inverse, transpose, augment it, fill it, etc..

- These operations are accessed as follows.
- Quit the matrix editor by pressing [Menu] and selecting the [Run] application.
- Press [OPTN][F2:MAT]
- You have the menus Mat,M(atrix)->L(ist), Det(erminant), Trn (transpose), Aug(ment) ->, Iden(tity),Dim(ension) Fill

- You press the [OPTN][F2:MAT] key sequence (just above)
- Press [F3:Det]; the command
**det**is displayed on screen. - Press [F1:Mat] the identifier
**Mat**is displayed. - Press [ALPHA] A; screen display
**det Mat A**. - Press [EXE] to get the value of the determinant.

[OPTN][F2:MAT] (MAT) [Alpha] A ^2 [EXE]

D. Product of two compatible matrices MatAXMatB

[OPTN][F2:MAT] (MAT) [Alpha] A [*] (MAT) [ALPHA] B [EXE]

Part E Invert a (square, non singular) matrix that was already defined.

Press [OPTN] [F2:Mat] to open a screen similar to the one in capture above

Press [F1:Mat] to have identifier Mat displayed.

Enter the name of the matrix by pressing [ALPHA] A, for example.

Press [SHIFT] [ ) ] activate the (x^-1) key.

This is what you might see (with parentheses and without).

Press [EXE] button to calculate the inverse.

Apr 20, 2011 | Casio FX-9750GPlus Calculator

Here is enough to get you started and a little more.

Read the post ant consult your calculator manual.

How to calculate the determinant of a (square, non-singular) matrix is described in part B

**A. Define a matrix (Create it)**

**B Operations on matrices**

Once you have one matrix, you can do operations on it: Calculate the determinant (if matrix is square), calculate its inverse, transpose, augment it, fill it, etc..

[OPTN][F2:MAT] (MAT) [Alpha] A ^2 [EXE]

D. Product of two compatible matrices MatAXMatB

[OPTN][F2:MAT] (MAT) [Alpha] A [*] (MAT) [ALPHA] B [EXE]

Part E Invert a (square, non singular) matrix that was already defined.

Press [OPTN] [F2:Mat] to open a screen similar to the one in capture above

Press [F1:Mat] to have identifier Mat displayed.

Enter the name of the matrix by pressing [ALPHA] A, for example.

Press [SHIFT] [ ) ] activate the (x^-1) key.

This is what you might see (with parentheses and without).

Press [EXE] button to calculate the inverse.

Read the post ant consult your calculator manual.

How to calculate the determinant of a (square, non-singular) matrix is described in part B

- Turn calculator ON.
- Press Menu,select the MAT icon and press [EXE]
- You see a list of possible matrix labels (A, B, C,D,E,F)
- All that have not been created have a "none" to their right
- Highlight a matrix name and press the right arrow. Where there was "none" , you have a template 0x0.
- That is where you specify the dimensions (mxn). example. 2x2
- Enter the first dimension and press [EXE]
- Enter the 2nd dimension and press [EXE]
- A matrix template opens where you enter the coefficients left to right and up down.
- After each coefficient press [EXE]. Cursor moves to the next coefficient, etc.

Once you have one matrix, you can do operations on it: Calculate the determinant (if matrix is square), calculate its inverse, transpose, augment it, fill it, etc..

- These operations are accessed as follows.
- Quit the matrix editor by pressing [Menu] and selecting the [Run] application.
- Press [OPTN][F2:MAT]
- You have the menus Mat,M(atrix)->L(ist), Det(erminant), Trn (transpose), Aug(ment) ->, Iden(tity),Dim(ension) Fill

- You press the [OPTN][F2:MAT] key sequence (just above)
- Press [F3:Det]; the command
**det**is displayed on screen. - Press [F1:Mat] the identifier
**Mat**is displayed. - Press [ALPHA] A; screen display
**det Mat A**. - Press [EXE] to get the value of the determinant.

[OPTN][F2:MAT] (MAT) [Alpha] A ^2 [EXE]

D. Product of two compatible matrices MatAXMatB

[OPTN][F2:MAT] (MAT) [Alpha] A [*] (MAT) [ALPHA] B [EXE]

Part E Invert a (square, non singular) matrix that was already defined.

Press [OPTN] [F2:Mat] to open a screen similar to the one in capture above

Press [F1:Mat] to have identifier Mat displayed.

Enter the name of the matrix by pressing [ALPHA] A, for example.

Press [SHIFT] [ ) ] activate the (x^-1) key.

This is what you might see (with parentheses and without).

Press [EXE] button to calculate the inverse.

Apr 08, 2011 | Casio FX-9860G Graphic Calculator

Here is enough to get you started and a little more.

Read the post ant consult your calculator manual. The screen captures below may not look exactly as your calculator but the steps are identical.

**A. Define a matrix (Create it)**

**B Operations on matrices**

Once you have one matrix, you can do operations on it: Calculate the determinant (if matrix is square), calculate its inverse, transpose, augment it, fill it, etc..

[OPTN][F2:MAT] (MAT) [Alpha] A ^2 [EXE]

D. Product of two compatible matrices MatAXMatB

[OPTN][F2:MAT] (MAT) [Alpha] A [*] (MAT) [ALPHA] B [EXE]

Part E Invert a (square, non singular) matrix that was already defined.

Press [OPTN] [F2:Mat] to open a screen similar to the one in capture above

Press [F1:Mat] to have identifier Mat displayed.

Enter the name of the matrix by pressing [ALPHA] A, for example.

Press [SHIFT] [ ) ] activate the (x^-1) key.

This is what you might see (with parentheses and without).

Press [EXE] button to calculate the inverse.

Read the post ant consult your calculator manual. The screen captures below may not look exactly as your calculator but the steps are identical.

- Turn calculator ON.
- Press Menu,select the MAT icon and press [EXE]
- You see a list of possible matrix labels (A, B, C,D,E,F)
- All that have not been created have a "none" to their right
- Highlight a matrix name and press the right arrow. Where there was "none" , you have a template 0x0.
- That is where you specify the dimensions (mxn). example. 2x2
- Enter the first dimension and press [EXE]
- Enter the 2nd dimension and press [EXE]
- A matrix template opens where you enter the coefficients left to right and up down.
- After each coefficient press [EXE]. Cursor moves to the next coefficient, etc.

Once you have one matrix, you can do operations on it: Calculate the determinant (if matrix is square), calculate its inverse, transpose, augment it, fill it, etc..

- These operations are accessed as follows.
- Quit the matrix editor by pressing [Menu] and selecting the [Run] application.
- Press [OPTN][F2:MAT]
- You have the menus Mat,M(atrix)->L(ist), Det(erminant), Trn (transpose), Aug(ment) ->, Iden(tity),Dim(ension) Fill

- You press the [OPTN][F2:MAT] key sequence (just above)
- Press [F3:Det]; the command
**det**is displayed on screen. - Press [F1:Mat] the identifier
**Mat**is displayed. - Press [ALPHA] A; screen display
**det Mat A**. - Press [EXE] to get the value of the determinant.

[OPTN][F2:MAT] (MAT) [Alpha] A ^2 [EXE]

D. Product of two compatible matrices MatAXMatB

[OPTN][F2:MAT] (MAT) [Alpha] A [*] (MAT) [ALPHA] B [EXE]

Part E Invert a (square, non singular) matrix that was already defined.

Press [OPTN] [F2:Mat] to open a screen similar to the one in capture above

Press [F1:Mat] to have identifier Mat displayed.

Enter the name of the matrix by pressing [ALPHA] A, for example.

Press [SHIFT] [ ) ] activate the (x^-1) key.

This is what you might see (with parentheses and without).

Press [EXE] button to calculate the inverse.

Mar 23, 2011 | Casio FX-9750GPlus Calculator

Here is enough to get you started and a little more.

Read the post ant consult your calculator manual. The screen captures below may not look exactly as your calculator but the steps are identical.

**A. Define a matrix (Create it)**

Press [SHIFT][QUIT] to return to the list of matrices to create new ones

**B Operations on matrices**

Once you have one matrix, you can do operations on it: Calculate the determinant (if matrix is square), calculate its inverse, transpose, augment it, fill it, etc..

[OPTN][F2:MAT] (MAT) [Alpha] A ^2 [EXE]

D. Product of two compatible matrices MatAXMatB

[OPTN][F2:MAT] (MAT) [Alpha] A [*] (MAT) [ALPHA] B [EXE]

Part E Invert a (square, non singular) matrix that was already defined.

Press [OPTN] [F2:Mat] to open a screen similar to the one in capture above

Press [F1:Mat] to have identifier Mat displayed.

Enter the name of the matrix by pressing [ALPHA] A, for example.

Press [SHIFT] [ ) ] activate the (x^-1) key.

This is what you might see (with parentheses and without).

Press [EXE] button to calculate the inverse.

Read the post ant consult your calculator manual. The screen captures below may not look exactly as your calculator but the steps are identical.

- Turn calculator ON.
- Press Menu,select the MAT icon and press [EXE]
- You see a list of possible matrix labels (A, B, C,D,E,F)
- All that have not been created have a "none" to their right
- Highlight a matrix name and press the right arrow. Where there was "none" , you have a template 0x0.
- That is where you specify the dimensions (mxn). example. 2x2
- Enter the first dimension and press [EXE]
- Enter the 2nd dimension and press [EXE]
- A matrix template opens where you enter the coefficients left to right and up down.
- After each coefficient press [EXE]. Cursor moves to the next coefficient, etc.

Press [SHIFT][QUIT] to return to the list of matrices to create new ones

Once you have one matrix, you can do operations on it: Calculate the determinant (if matrix is square), calculate its inverse, transpose, augment it, fill it, etc..

- These operations are accessed as follows.
- Quit the matrix editor by pressing [Menu] and selecting the [Run] application.
- Press [OPTN][F2:MAT]

- You press the [OPTN][F2:MAT] key sequence (just above)
- Press [F3:Det]; the command
**det**is displayed on screen. - Press [F1:Mat] the identifier
**Mat**is displayed. - Press [ALPHA] A; screen display
**det Mat A**. - Press [EXE] to get the value of the determinant.

[OPTN][F2:MAT] (MAT) [Alpha] A ^2 [EXE]

D. Product of two compatible matrices MatAXMatB

[OPTN][F2:MAT] (MAT) [Alpha] A [*] (MAT) [ALPHA] B [EXE]

Part E Invert a (square, non singular) matrix that was already defined.

Press [OPTN] [F2:Mat] to open a screen similar to the one in capture above

Press [F1:Mat] to have identifier Mat displayed.

Enter the name of the matrix by pressing [ALPHA] A, for example.

Press [SHIFT] [ ) ] activate the (x^-1) key.

This is what you might see (with parentheses and without).

Press [EXE] button to calculate the inverse.

Mar 09, 2011 | Casio FX-9860G Graphic Calculator

Sorry if post is too long. Skim through it to find the inverse of a matrix in part at the end:Part E

Note: Matrix must be square (nXn) and non singular (its determinant not equal to zero)

A. Define a matrix (Create it)

Press [SHIFT][QUIT] to return to the list of matrices to create new ones

**B Operations on matrices**

Once you have one matrix, you can do operations on it: Calculate the determinant (if matrix is square), calculate its inverse, transpose, augment it, fill it, etc..

[OPTN][F2:MAT] (MAT) [Alpha] A ^2 [EXE]

D. Product of two compatible matrices MatAXMatB

[OPTN][F2:MAT] (MAT) [Alpha] A [*] (MAT) [ALPHA] B [EXE]

Part E Invert a (square, non singular) matrix that was already defined.

Press [OPTN] [F2:Mat] to open a screen similar to the one in capture above

Press [F1:Mat] to have identifier Mat displayed.

Enter the name of the matrix by pressing [ALPHA] A, for example.

Press [SHIFT] [ ) ] activate the (x^-1) key.

This is what you might see (with parentheses and without).

Press [EXE] button to calculate the inverse.

Note: Matrix must be square (nXn) and non singular (its determinant not equal to zero)

A. Define a matrix (Create it)

- Turn calculator ON.
- Press Menu,select the MAT icon and press [EXE]
- You see a list of possible matrix labels (A, B, C,D,E,F)
- All that have not been created have a "none" to their right
- Highlight a matrix name and press the right arrow. Where there was "none" , you have a template 0x0.
- That is where you specify the dimensions (mxn). example. 2x2
- Enter the first dimension and press [EXE]
- Enter the 2nd dimension and press [EXE]
- A matrix template opens where you enter the coefficients left to right and up down.
- After each coefficient press [EXE]. Cursor moves to the next coefficient, etc.

Press [SHIFT][QUIT] to return to the list of matrices to create new ones

Once you have one matrix, you can do operations on it: Calculate the determinant (if matrix is square), calculate its inverse, transpose, augment it, fill it, etc..

- These operations are accessed as follows.
- Quit the matrix editor by pressing [Menu] and selecting the [Run] application.
- Press [OPTN][F2:MAT]

- You press the [OPTN][F2:MAT] key sequence (just above)
- Press [F3:Det]; the command
**det**is displayed on screen. - Press [F1:Mat] the identifier
**Mat**is displayed. - Press [ALPHA] A; screen display
**det Mat A**. - Press [EXE] to get the value of the determinant.

[OPTN][F2:MAT] (MAT) [Alpha] A ^2 [EXE]

D. Product of two compatible matrices MatAXMatB

[OPTN][F2:MAT] (MAT) [Alpha] A [*] (MAT) [ALPHA] B [EXE]

Part E Invert a (square, non singular) matrix that was already defined.

Press [OPTN] [F2:Mat] to open a screen similar to the one in capture above

Press [F1:Mat] to have identifier Mat displayed.

Enter the name of the matrix by pressing [ALPHA] A, for example.

Press [SHIFT] [ ) ] activate the (x^-1) key.

This is what you might see (with parentheses and without).

Press [EXE] button to calculate the inverse.

Feb 25, 2011 | Casio FX9750GII Graphic Calculator

A. Define a matrix (Create it)

- Turn calculator ON.
- Press Menu,select the MAT icon and press [EXE]
- You see a list of possible matrix labels (A, B, C,D,E,F)
- All that have not been created have a "none" to their right
- Highlight a matrix name and press the right arrow. Where there was "none" , you have a template 0x0.
- That is where you specify the dimensions (mxn). example. 2x2
- Enter the first dimension and press [EXE]
- Enter the 2nd dimension and press [EXE]
- A matrix template opens where you enter the coefficients left to right and up down.
- After each coefficient press [EXE]. Cursor moves to the next coefficient, etc.

Press [SHIFT][QUIT] to return to the list of matrices to create new ones

Once you have one matrix, you can do operations on it: Calculate the determinant (if matrix is square), calculate its inverse, transpose, augment it, fill it, etc..

- These operations are accessed as follows.
- Quit the matrix editor by pressing [Menu] and selecting the [Run] application.
- Press [OPTN][F2:MAT]

- You press the [OPTN][F2:MAT] key sequence (just above)
- Press [F3:Det]; the command
**det**is displayed on screen. - Press [F1:Mat] the identifier
**Mat**is displayed. - Press [ALPHA] A; screen display
**det Mat A**. - Press [EXE] to get the value of the determinant.

[OPTN][F2:MAT] (MAT) [Alpha] A ^2 [EXE]

D. Product of two compatible matrices MatAXMatB

[OPTN][F2:MAT] (MAT) [Alpha] A [*] (MAT) [ALPHA] B [EXE]

Press the F6 key to access other functions.

Jan 23, 2011 | Casio FX9750GII Graphic Calculator

I am afraid that "find the solution of a matrix" does not mean anything. However if you want to perform some arithmetic operations on the matrices ( multiplication, addition, subtraction) you can do so using the regular operation keys.

If on the other hand you want to calculate determinants of square matrices, inverse square matrices etc.

Go to the RUN/MAT screen and press [OPTN, then press F2 to open access these operations and this is what you see.

F1 type the MAT identifier in command line

M>L converts a matrix to a list

Det calculates the Determinant of a square matrix

Trn transposes the matrix,

etc.

To invert a square matix, use the [X^-1] key e.g. MatA^-1

If on the other hand you want to calculate determinants of square matrices, inverse square matrices etc.

Go to the RUN/MAT screen and press [OPTN, then press F2 to open access these operations and this is what you see.

F1 type the MAT identifier in command line

M>L converts a matrix to a list

Det calculates the Determinant of a square matrix

Trn transposes the matrix,

etc.

To invert a square matix, use the [X^-1] key e.g. MatA^-1

Nov 22, 2010 | Casio FX9750GII Graphic Calculator

Hi,

If you have mastered matrix manipulations on the TI calculators, it should be a breeze to learn the same on the Casios.

**A. Define the matrix (Create it)**

Press [SHIFT][QUIT] to return to the list of matrices to create new ones

**Operations on matrices**

Once you have one matrix, you can do operations on it: Calculate the determinant (if matrix is square), calculate its inverse, transpose, augment it, fill it, etc..

[OPTN][F2:MAT] (MAT) [Alpha] A ^2 [EXE]

Product of two compatible matrices MatAXMatB

[OPTN][F2:MAT] (MAT) [Alpha] A [* ) (MAT) [ALPHA] B [EXE]

Hope it helps.

Thank you for using FixYa.

If you have mastered matrix manipulations on the TI calculators, it should be a breeze to learn the same on the Casios.

- Turn calculator ON.
- Press Menu,select the MAT icon and press [EXE]
- You see a list of possible matrix labels (A, B, C,D,E,F)
- All that have not been created have a "none" to their right
- Highlight a matrix name and press the right arrow. Where there was "none" , you have a template 0x0.
- That is where you specify the dimensions (mxn). exemple. 2x2
- Enter the first dimension and press [EXE]
- Enter the 2nd dimension and press [EXE]
- A matrix template opens where you enter the coefficients left to right and up down.
- After each coefficient press [EXE]. Cursor moves to the next coefficient, etc.

Press [SHIFT][QUIT] to return to the list of matrices to create new ones

Once you have one matrix, you can do operations on it: Calculate the determinant (if matrix is square), calculate its inverse, transpose, augment it, fill it, etc..

- These operations are accessed as follows.
- Quit the matrix editor by pressing [Menu] and selecting the [Run] application.
- Press [OPTN][F2:MAT]

- You press the [OPTN][F2:MAT] key sequence (just above)
- Press [F3:Det]; the command
**det**is displayed on screen. - Press [F1:Mat] the identifier
**Mat**is displayed. - Press [ALPHA] A; screen display
**det Mat A**. - Press [EXE] to get the value of the determinant.

[OPTN][F2:MAT] (MAT) [Alpha] A ^2 [EXE]

Product of two compatible matrices MatAXMatB

[OPTN][F2:MAT] (MAT) [Alpha] A [* ) (MAT) [ALPHA] B [EXE]

Hope it helps.

Thank you for using FixYa.

Nov 23, 2009 | Casio Office Equipment & Supplies

If a matrix has a determinant of 0, this error appears. If you get this error, your matrix doesn't have an inverse.

Jun 02, 2009 | Texas Instruments TI-84 Plus Silver...

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