How do you plug in this problem into scientific calculator TI-30XA and get the answer 2/7X +1/4= 4/9 -5/7X +4/9

Wrong battery, I am researching
1 Lithium Metal batteries required. (included)
https://www.amazon.ca/Texas-Instruments-TI-30Xa-Scientific-Calculator/dp/B00000JBNS

Duracel 76a is a standard alkaline battery according to this

https://www.amazon.ca/Duracell-Specialty-Alkaline-Battery-long-lasting/dp/B007IAWVUM

But No, LR44 is the same as 76a. Did you change both?? You said 'I replaced THE battery', there is clearly two batteries.

https://www.ifixit.com/Guide/Texas+Instruments+TI-30Xa+Battery+Replacement/34616

Time for a new one probably.

Texas Instruments TI-30Xa Scientific Calculator ' www.staples.ca

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It is a generic scientific calculator and not feature rich. It can calculate trigonometric functions, exponentials, logs, powers, combinations and permutations. You must have an idea about what you are calculating in AC circuits and figure out, by reading the manual, what calculations can be performed on this basic scientific calculator. The manual is available online at education.ti.com

Two keys can be used to enter negative exponents on the TI-30Xa scientific calculator; the [y^x] key or the [EE] key. The [y^x] key is used for all exponents while the [EE] key is used for scientific notation only.
The examples below will demonstrate how to use both keys:

1) Entering 7^-2.

• Press [7] [y^x] [2] [+/-] [=].
• The calculator will display: 0.20408163.
2) 1*10^-3.

• Press [1] [EE] [3] [+/-] [=].
• The calculator will display: 0.001

You can put it in scientific notation by hitting 2nd and 5. It will put your answers in scientific notation and not round that particular answer you have.

You can find the entire guide for de TI-30XA following this link: http://education.ti.com/downloads/guidebooks/scientific/30xa/30xa-eng.pdf

Hello,
Your calculator has 3 memories (M1, M2,M3)
To store the number 170 in M1 use 170[STO]1
To recall a number from M1 use [RCL]1
To add a number to the content of M1 [2nd][SUM]1 (adds displayed value to contents of M1).
[2nd][EXC] 2 exchanges the value already displayed with the contents of M2:

To erase (clear) a memory register, just store 0 in it.

Hope it helps.

It's been a while since my TI calculator died, but I think you can just hit EE (may be "exp" on your model) followed by =.

Hello,

1. To convert a number to scientific equation, use [2nd][Sci]
Exemples 12345 [=] screen shows 12345 Then [2nd][Sci] coverts it to 1.2345 ^04 to the power 4.
2. To enter directly a number in scientific notation (e.g. -1.2345 X10^(-65) a very small number) you use the [EE] key 1.2345[+ /-][EE][+/-]65 shows as -1.2345 -65
1.6X10^(-19) 1.6[EE][+/-]19 shows as 1.6 -19

Hope it helps

If you mean using the "EE" key it's straightforward.

To enter scientific numbers, enter the number, then press EE, then the exponent value. The TI-30XA will stay in scientific display until you "clear" or turn it off. It will also switch to scientific notation if you multiply big numbers that exceed the display.

E.g. Input 3, EE, 10, X, 3, EE, 10, =, gives you the answer 9 times 10 to the power 20. Press the "square root" key and you will get back 3 times 10 to the power 10.

You can mix entries too, e.g. 3, EE, 10, X, 2, =, gives you 6 times 10 the power 10....

The TI-30XA cannot solve algebraic equations. You need a more advanced calculator for that, like the TI-89.

Regards,
javabytes