Melody

921 Questions
34315 Answers

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Mathigon website

I just discovered a site called mathigon

https://mathigon.org/dashboard
read more ..

Melody Apr 2, 2022

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Reporting problems.

There are a number of people having problems at the moment.
If you lodge an error can you please give all relevant information that you can think of.
Where you are in the world - the city or the country - is often very important information. read more ..

Melody Mar 16, 2022

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How to make an empty rectangle in Latex

I just worked out how to make an empty box of various horizonal size easily in LaTex.
This is not a recommended method, but other methods that I have tried here have not worked.
This coding is really simple. Just put letters inside read more ..

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Melody Mar 15, 2022

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871

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HAPPY ANNIVERSARY CHRIS! (CPhill)

I just realized that you became a member here exactly 8 years ago today!

It has been great to have you here all that time

off-topic

Melody Mar 13, 2022

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WELCOME BACK CPHILL !

Melody Feb 11, 2022

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Very interesting question. No high level maths required.

This question was posted a couple of days ago.
https://web2.0calc.com/questions/geometry_73561

I think it is really interesting. It looks much more difficult than it really needs to be. read more ..

Melody Feb 1, 2022

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Members have a better experience. Their questions get more attention.

Almost everyone is posting as a guest.
If you post as a member your questions will have a far greater chance of a timely and helpful response.
If you are a genuine learner and interact with us, you will become known and answerers will do read more ..

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Melody Jan 9, 2022

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HAPPY BIRTHDAY CHRIS!

Melody Dec 20, 2021

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Some guidelines for question askers.

Please note:
1) Ask only one question per post.
2) When asking a question talk about what you have tried for yourself. Then people will take you more seriously and will be more able and willing to help.
3) If you get an answer read more ..

off-topic

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Melody Nov 4, 2021

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Remeniscing - a little historical humour.

I just found this old post that some of you, who have been around for a while, might find amusing.

https://web2.0calc.com/questions/look-at-the-new-leader-board

off-topic

Melody Oct 29, 2021

+118725

0

allisoncollins:
m<r=47

Maybe there is a typographical error in your question?
We are not sure what you mean?

MelodyMar 27, 2014

+118725

0

BonBon Skiptymylee:
Is There Anything In This World, Non-Math Related?

Hi Bon Bon,

Let me see.
Math concepts are all around us. That is certainly true. But there ary many things where maths is of little direct concern.
Many a good book is not maths related. The physical creation of the book involved a great many maths concepts but the words on the page, the story itself, did not.
There are a great many things, skills and concepts, that we learn in life that have very little direct mathematical involvement.
Language is much more essential to basic skills than any understanding of mathematics is.

As for needing mental help. I am sorry but I am not a psychiatrist. But then I doubt that you really need one.

MelodyMar 27, 2014

+118725

0

pedro1259:
2/5x-5=y

This is not a question.
It is the equation of a line but it is not in any nice form.
What is your question?

MelodyMar 27, 2014

+118725

0

Guest:
The quadratic function y = (x-4)^2 -3 has a vertex at (4, -3). CORRECT
The "a" value is 1 so the graph opens up.
The line of symmetry is x=4. CORRECT
The y-intercept is -3. NOT CORRECT
The roots are 4+square root of 3, and 4 - square root of 3. CORRECT

Thank you for answering. I really like people to get involved.
Now I will take a look at your contribution
It would have been nice if you had explained how you got these answers.

People can't learn from your answers if you don't explain where they come from.
Plus it is hard for me to comment on your errors if you don't show me their origin.

MelodyMar 27, 2014

+118725

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Guest:
(x-4)^2-3

Some of what our guest said is correct and some is not.
Firstly, your expression is not an equaton because it does not have an equal sign.
What do you actually want to do with it. Maybe you just want to simplify it ?
To do this you will need to expand (x-4) ².

(x-4) ²
=(x-4)(x-4)
=x ²-8x+16

So
(x-4) ² - 3
=x ²-8x+16 - 3
=x ²-8x+13

MelodyMar 27, 2014

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0

Already answered.
You can just use the site calculator to do questions like these. It is quicker than waiting around for one of us to do the exact same thing

MelodyMar 27, 2014

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0

Jennina1514:
The sq root of (1155/60)?

Hi Jennina,
This is an approximation. Is that what you want?

MelodyMar 27, 2014

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0

Thank you Alan, I didn't realise that they were there.

MelodyMar 26, 2014

+118725

+9

Hi all,
Another quiet day. Where have all the young people gone?
There were a number of high level questions with great high level answers.
Answers were provided by CPhill, Rom, reinour-g, Stu, Bertie, Alan, I like Serena, Samgelinas, anonymous1, and PhDSmith. Thank you all.
Dr. Smith became a member today. Welcome to the forum, we hope you like it here. I wonder if you saw my 'Lost in Space' post recently? It wasn't there long, I deleted it. So maybe not.
The only question not yet answered is the Hyperbola Proof by CPhill.

A note mainly for the younger people:
I am wondering why there are so many less low level questions the last couple of days than I would normally expect. Lower level questions are very welcome here. Don't be intimidated by the harder questions. I want this forum to be available, useful and friendly for all ages and abilities. Some of the other mathematicians have told me that that is what they want too. If you are not completly happy with an answer, please tell us. You can tell us that you don't understand any of it, or some of it. You can tell us that your teacher does it differently and then we will try to show you your teacher's way. We like to get feed back. You can help us to learn the best ways to teach.

That is it for tonight.
Melody.

MelodyMar 26, 2014

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pancakes:
What the XXXX?

Hello Pancakes,
I don't mind you bopping along around in here. I want this to be a site that is both friendly and helpful for children, BUT the language you have used here is not acceptable.
Find yourself some cleaner words with which to express you amazement. There are plenty of them. Use your imagination.
Melody.

MelodyMar 26, 2014