सदस्य: Melody

921 Questions
34315 Answers

-2

1731

+118692

Mathigon website

I just discovered a site called mathigon

https://mathigon.org/dashboard
और पढ़ें ..

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Melody 2 Apr 2022

-10

596

+118692

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. और पढ़ें ..

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Melody 16 Mar 2022

-4

1404

+118692

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 और पढ़ें ..

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Melody 15 Mar 2022

-5

859

+118692

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

WELCOME BACK CPHILL !

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Melody 11 Feb 2022

-6

708

+118692

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. और पढ़ें ..

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Melody 1 Feb 2022

-8

871

+118692

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 और पढ़ें ..

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Melody 9 Jan 2022

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982

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HAPPY BIRTHDAY CHRIS!

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 और पढ़ें ..

विषय से परेे

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Melody 4 Nov 2021

-10

1078

+118692

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

विषय से परेे

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Melody 29 Okt 2021

+118692

Blank:
I have a twelve by twelve room. One room (x) is 56.25% of the area of the other room.(y) Y-144square feet.

I really do not understand the wording of this question.

Melody13 Feb 2014

+118692

Bluegdog7:
13y^3+47y^2+13y+47

What do you want us to do with this, where is the question? I don't think that there are any integer factors if that is what you are after.

Melody13 Feb 2014

+118692

Kiki Riggs:
:( I need help with this .. the term # is 4 and it says add 15 subtract 10 each time ??

Your question does not make much sense.
If you add 15 and subtract 10 each time then you are really justs adding 5 each time arn't you?

Melody13 Feb 2014

+118692

Cool

BUT once is enough!

Melody13 Feb 2014

+118692

Jay:
5/9+3/4x=2/3x-1/6x

Hi Jay and GrammarFascist,

That is a great answer there, I am impressed.
I would just do it a little bit diferently.
You have denominators of 9,4,3,6 (that's assuming all the x's are on the top)
now, the lowest common denominator of all these is 36.
If you multiply everything on both sides by 36 you will get rid of all the fractions in one fell swoop.
Then it will be much easier to deal with,

also,
Why don't you both join up properly,

There are some big benefits to joining up.
1) It is a little easier to make a post.
2) Once you have made a post you can edit it if you are a member. I edit my post all the time. I would hate not to be able to do that.
3) You can also delete your post so long as no-one has answered you yet.
4) No-one else can use your username
5) You can send and receive private messages to other people and make real friends. I know that I have.

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Melody13 Feb 2014

+118692

ncastleb:
What is the cube root of 27?

3 because 3x3x3=27

Melody13 Feb 2014

+118692

algebra2:
how to solve equations by using quadratic formula

I just did this one.

Melody13 Feb 2014

+118692

algebra2:
how to solve equations by using quadratic formula

It is only for the quadratic equations [they have an x ² term but no exponents (powers) higher than that] and they are equal to zero.

for example
5x ²-7x=12
I recognise that I can take all this to one side and have it equal to 0

5x ²-7x-12 = 0
Now that it is in the from

ax ² + bx + c = 0 I can use the quadratic formula
a=5, b=-7, and c=-12

Look at this you tube clip it will help you remember the quadratic formula.
Just high light it and then right clip, then choose goto from the drop down menu

http://www.youtube.com/watch?v=O8ezDEk3qCg

the for the substitution of your question
ALWAYS write the formula first then
x ={ - -7 ± sqrt[ (-7) ² - 4*5*-12 ] } / { 2 * 5 }

x = { 7 ± sqrt [ 49 + 240 ] } / 10

x = ( 7 ± sqrt [ 289 ] } / 10

The square root of 289 is 17. How is that for coincidence, I didn't do it on purpose

x = ( 7 ± 17 ) / 10

x = 24/10 OR x = -10/10

x = 2.4 or -1

If you substitute either of these values into the original equation it should make the equaation true. If not then I made a silly mistake somewhere.

Anyway I hope that helps. Make sure you look at the clip. That doesn't require much effort.

Melody13 Feb 2014

+118692

EPICCAMPER:
E=mc2

Actually E=mc ²

You need to use the 'sup' button located above the smilies to do this. it is pretty easy, though.

Melody13 Feb 2014

+118692

dkye:
[size=200] [/size]how old am i

Older than your teeth and younger than your tongue.

Melody13 Feb 2014

यूजर का नाम	Melody
स्कोर	118692
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