Melody

921 Questions
34315 Answers

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Mathigon website

I just discovered a site called mathigon

https://mathigon.org/dashboard
lire plus ..

Melody 2 avr. 2022

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590

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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. lire plus ..

Melody 16 mars 2022

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1400

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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 lire plus ..

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Melody 15 mars 2022

-5

854

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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

Hors sujet

Melody 13 mars 2022

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WELCOME BACK CPHILL !

Melody 11 févr. 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. lire plus ..

Melody 1 févr. 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 lire plus ..

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Melody 9 janv. 2022

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HAPPY BIRTHDAY CHRIS!

Melody 20 déc. 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 lire plus ..

Hors sujet

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Melody 4 nov. 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

Hors sujet

Melody 29 oct. 2021

+118677

+2

Can you explain better what you want to know?
root 5 is an irrational number which means that it cannot be written exactly as a fraction or a decimal.
You can get an estimate from your calculator.
I probably haven't answered your question.

Melody29 sept. 2013

+118677

+2

Ok, I agree, this is a good question.
I assume that you mean the price falls by 40% of the NEW price.

Let the bike's original price by $100
It goes up by 20% which is $20. so the new price is $120.
Now the price goes down by 40%
40% of $120 is 0.40*120 = $48
New price is $120 - $48 = $72

So the original price was $100
Now it is $72
Price has dropped by $28
This is 28/100*100% decrease i.e. 28% decrease

You could choose any original price and the answer would be the same.

Melody29 sept. 2013

+118677

+2

It is just (3 squared) plus (2 squared). what is causing you a problem?

Melody29 sept. 2013

+118677

+2

I've only done part b
I have done this as a rough copy attachment.
I am notorious for making stupid mistakes but if you can follow at all it should show you how they are done.
If you would like me to explain better feel free to ask

Ajeng's problem .jpg

Melody29 sept. 2013

+118677

+2

Divide by 60 to get 1%
then multiply by 40 to get 40%

Melody29 sept. 2013

+118677

+2

I don't think that the question makes any sense.

Melody29 sept. 2013

+118677

+2

Sorry, the question does not make sense.

Melody29 sept. 2013

+118677

+2

Scientific calculators have a pi button, you usually have to press shift or inverse first.
For simple calculators just use the approximate value of 3.14159

Melody29 sept. 2013

+118677

+2

Sorry the question does not make any sense.

Melody29 sept. 2013

+118677

+2

I won't answer your question but I will tell you that 3^(-4) = 1 / 3^(+4) = 1/ 81

Melody29 sept. 2013