# Texas Instruments TI-86 Calculator - Answered Questions & Fixed issues

There is no solution for old age. Get a newer calculator.

Texas... | Answered on May 28, 2018 | 632 views

The - key is for subtraction, an operation that needs two numbers. If you press - as the first key on a line, the calculator assumes you want to subtract something from the previous answer, Ans.

If you want to enter a negative number, use the (-) key on the bottom row of the keyboard, just to the left of the Enter key.

Texas... | Answered on Aug 18, 2016 | 97 views

See images below

Texas... | Answered on May 03, 2016 | 209 views

See cap image below

Texas... | Answered on May 27, 2015 | 100 views

83/360 is already reduced to lowest terms since 83 and 360 have no factors in common (other than 1).

Texas... | Answered on Nov 07, 2014 | 74 views

Just divide the numerator by the denominator. For example, to convert 1/4 to decimal, press 1 / 4 ENTER and see .25

Texas... | Answered on Sep 15, 2014 | 367 views

Every time you change batteries this will happen to you. First press 2nd then press and hold the down arrow. Hold until their is no black in the background but you can still see the numbers on the screen.

Texas... | Answered on Sep 05, 2014 | 451 views

Read on how to set up calculator for graphing. And check your input.

Texas... | Answered on Sep 02, 2014 | 93 views

You can type in an x-variable by pressing the x-var key.
For other graph types, the variables r, theta, t, can be enter by pressing the appropriate function key. from the graph equation entry screen.

Texas... | Answered on Aug 28, 2014 | 71 views

Error 07 Syntax
Means you made a typing error while entering the equation. Using the minus sign instead of the negation sign (change sign) (-), can produce a syntax error. Maybe you need to explicitly type the multiplication sign
y= (-) 1.5*x +3
Try entering it as 3 - 1.5*x

Texas... | Answered on Aug 28, 2014 | 136 views

Error 07 Syntax
Means you made a typing error while entering the equation. Using the minus sign instead of the negation sign (change sign) (-), can produce a syntax error. Maybe you need to explicitly type the multiplication sign
y= (-) 1.5*x +3
Try entering it as 3 - 1.5*x

Texas... | Answered on Aug 28, 2014 | 141 views

Error 07 Syntax
Means you made a typing error while entering the equation. Using the minus sign instead of the negation sign (change sign) (-), can produce a syntax error. Maybe you need to explicitly type the multiplication sign
y= (-) 1.5*x +3
Try entering it as 3 - 1.5*x

Texas... | Answered on Aug 28, 2014 | 164 views

425%

Texas... | Answered on Jun 20, 2014 | 25 views

Press 3 2nd MATH F5 MORE F4 9 1 . 0 5 3 ENTER
or
press 9 1 . 0 5 3 ^ ( 1 / 3 ENTER

Texas... | Answered on Jun 12, 2014 | 61 views

0.0035

Texas... | Answered on Jun 11, 2014 | 22 views

.55% is 0.0055

If you meant 55%, it's 0.55

Texas... | Answered on Jun 07, 2014 | 18 views

You're probably trying to graph a function that does not involve stat plot features. You can correct this by turning off the stat plot features. Press "2ND" "STAT PLOT" and then select 4:PlotsOff.

Texas... | Answered on Jun 02, 2014 | 206 views

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