Solving Linear Equations Using the TI 83 or TI 84 Series Calculator 

I'm glad I could help.

You're most welcome

philaciousnessicity Is is true that everytime there’s a straight line,It’s always a linear equation? Please answer. Have intern assessment tommorow

@@mamagaming5132 Sorry that this comment did not pop up in my email. The short answer is no, not every straight line is a linear equation.

How can anyone criticise this video?!

@@yeety1208 It happens. I don't mind it except when people just comment to say "ths iz trasch" or w/e they type now...lol

You are welcome.

You're welcome. Make sure that you understand "why" it is that way though. The understanding makes it easier.

+MrJosh6889 This is pretty much it. I started making these videos for my college students. However the time requirement of compliance to the Americans with Disabilities Act's Closed Captioning of all instructional videos is just too much. If you have video suggestions, I'll certainly do my best, but I can't guarantee compliance.

I appreciate the answer and understand. We're all very busy after all. I really do want to thank you for the content you have provided. I will be making use of it as holes (and there are many of them) in my knowledge become apparent.

I'm glad I can help!

Hi my screen is showing ERR: INVALID DIM I did as you prompted and it's still not working

Solving single variable linear equations with matrices? That seems ill-advised to be quite frank about it.

Thank you. I'm glad I could help :)

Rudy Ruacho I'm glad I can help!

Glad I could help

Sir is finding the intersect the same thing as doing the equation on paper except using the calculator while using the graphing method

Technically, x/x produces a straight line (or looks to be...but isn't quite a line), but it isn't a linear equation. Honestly, I haven't watched the vid since I made it, so not sure the context. I'll try the x-value recall. Thank you for that info.

I'm glad I could help!

I'm glad I could help!

+Ashlie Murray Glad I could help

I'm certainly glad that I could help!

Clair T Glad I could help.

Glad I could help.

I'm glad this was able to help.

philaciousnessicity i have a college quiz on the 24 i’m a wreck rn cause i can’t figure how to use like x or y

You're welcome!

If solving by hand, you could use all of those (commutative btw...to commute is to move locations). However, this is more of a "cheat" to get around having to solve by hand. I'm not a fan since I don't care for math-magic, but people just trying to survive math...this is for them.

Numan1114 You may be able to, I'm not certain. I don't believe my emulator has that option. If it works, I say "Use it!"

Glad I could help :)

I actually have a had time with Algebra so far I am using pre Algebra in college and the one thing I don’t like is the teachers can’t help you, I haven’t been in School for 10 years and some of teachers think you should know it. Unfortunately I didn’t use pre algebra.

@@marlaluz1235 I know in my own classes I'm sometimes back-to-back and so I don't have time for my students that way. I always try to make myself available outside of the class however. Unfortunately you also may be caught up in a national effort to speed students through the math courses. Going faster typically does not mean that you get more help...sad really. I would suggest going to their office hours everyday. Bug the snot out of them. That's how I made it through.

I agree I definitely will ask them for help and also bug the crap out of you with help as well 😂 I do want to pass so bad and I don’t want Algebra to be the reason I don’t pass.

In the calculator itself or just as a symbol on paper? Outside of theta, I don't think the 84 series uses the Greek alphabet.

Nereida Goldie Padilla Glad I could help

Enter it exactly like that. Be sure to use the test menu for the equality. Then store I would say five different prime numbers in for x using the ”STO" command. If all five turn out to be true it's a reasonable assurance but not a proof.

@@philaciousnessicity I am new to this. Where is the Test Menu?

@@stevenscottoddballz 2nd key then "math" button 2 down from that. I believe first menu is the relation menu.

You're welcome!

You're welcome.

In this calculator, you don't solve it any other way. There is no Computer Algebra System installed. You could change the nature of the problem and use matrices, but that's even more complicated. To solve this though, you don't use the equal sign of the calculator...that does something else.

Glad I could be there!

Yes, but since the basic graphers (TI-83/84, 82, 85, 86, 73) can't really do algebra (no CAS), you'll just need to convert whichever letter you have to an "x". Then pop it in, solve it, and resubstitute your original letter in.

Just to be clear, an option is "selected" if it has a black outline with white lettering. Be sure that both of your Y1 and Y2 equal signs look like this. Another thing to check are the plots at the top of the Y= menu. Be sure that none of them are selected either. You can get to those by pressing the UP arrow key from the Y1 position.

Thanks for the quick reply! Yes, both equal signs are selected when I press [Graph], but then only y1 is shown, and when I return to [y=], y2 is not selected anymore. Nothing at the top is selected. What I noticed is that instead of the backward slash before the equations (y1, y2, etc) there is like a "forward" symbol, and when I select that to edit, I can only change that to "fast forward" or "play" symbols. I don't know how to have the slashes again. I believe that would solve the problem.

Those are alternate lines to display. The order is: thin line, thick line, shade above (greater than), shade below (less than), trace while graphing, trace path w/o graphing line, and dotted line. If you only have a circle there, that would be an issue. Keep pressing "ENTER" on the icon to the left of Y2 until a thin, connected line appears. It should match the default in the others (Y3, Y4, etc.) Another option is the window isn't large enough (zoomed correctly) to view both equations. I recommend pressing "ZOOM" then selecting option 0 (ZoomFit). See if those help. It's difficult without being able to play with it ;)

You're welcome!

You're welcome.

+bodyworkz My first thought is that you're looking for the answer 8 * x^9 * y^15 using rules for exponent manipulation. If that's the case, I'm sorry, but the TI-83/84 will not work through problems of that type. You need a CAS (Computer Algebra System) for that capability. The TI-89/92/Voyager as well as the TI-NSpire CAS have that ability. The best the TI-83/84 can do is check your answer using numbers...put your original expression in (2 * x^3 * y^5)^3, press the "2nd" key and "math" for the "TEST" menu. Select the "=" option by pressing "1" or "Enter". Finally, put what you think the answer is...for example 8 * x^9 * y^15. Press "Enter"...if the answer is a 0, it's false, and your expansion is incorrect. If it's a 1, it's true, and you've found the answer. That's the best it has without some additional programming/apps.

Is there a program/app I can get that will simplify expressions like this?

I try to get back to people ASAP, but it's been a crazy couple of days. What was the issue? My first thought is that the intersection didn't happen on screen, and you needed to change your window settings.

I have reposted the link. Honestly, I had no issues with it in Chrome, so I'm not sure why it didn't work for you. Here is the link again in the comments. Perhaps this will work better. drive.google.com/file/d/0B5lp1_mbNghfVFJ5Y3V5bWVodGs/edit?usp=sharing

Press the "y=" button to the lower left of the screen. Make sure the "plots" up top are white with black letters. If any are black with white letters, use the arrows to move to them, and press "ENTER". I have a feeling that the plot dimensions are in place causing the "invalid dimension" issue.

Do you have one in mind, or just in general?

I know I'm 3 years late, but it's because "plot 1" is highlighted under your Y= table. Hopefully you're not still stuck on the same homework question.

Dennis Author Yes. Actually, I teach Basic and Intermediate Algebra courses (essentially the equivalent of Alg 1 and parts of Alg 2) at a community college. I make these for my students and give everyone access.

I'd be interested to know how it's cheating. Good luck on the test.

philaciousnessicity my math teacher never shows us this trick or calculator lessons

@@relok3z429 seems ill-advised. It's like telling you that you can use a forklift to stock items then not show you how. Though to be honest, these calculators can do a lot more than what we normally have time for :)

Press the "y =" button. Is there any "plots" at the top that have a black background?

jamie petty 1) press the "y=" key...are any of the plots on? If so, shut those off. 2) if that doesn't do it press the window key. Make sure that X is set from -10 to 10. If that doesn't work I would normally tell you to let me play with your calculator, however that's really not an option here. So just comment again we'll work something else out.

philaciousnessicity wow thank you so much for replying will try it and see if it works

Yes, there has been.

I completely agree with you. The problem can be done in your head in

You should hear it now...deeper