Melody

921 Questions
34316 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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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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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

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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

+118730

0

101.55>|1.55x|

abs(1.55x) < 101.55

Now I find it easiest to think of these by drawing a number line and shading in where 1.55x must be.
Since I can't show you the diagram I will try to explain.
What it is really saying is that the distance from 1.55x is less than 101.55 from 0. (pos or neg direction)
so
1.55x must be between -101.55 and +101.55
so
-101.55 < 1.55x < 101.55
divide everything by 1.55
-65.516 < x < 65.516 this is correct to 3 decimal places.

Melody30 oct. 2013

+118730

0

The function is missing.

Melody30 oct. 2013

+118730

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There is not that many choices and you have a calculator (there is one on this site) so why don't you use trial and error until you work it out?

Melody30 oct. 2013

+118730

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http://answers.yahoo.com/question/index?qid=20080817181414AAXGEra

The circumference of the Sun is 4239000 Kilometers using 675,000 Kilometers as its radius.

It would be good if you learned how to spell circumference . lol

Melody30 oct. 2013

+118730

0

Is .99999 repeater 1 or .9999 repeater?

It is 0.9repeater.
It is not 1, it is less than 1 but this is something that I have pondered over

You can show by division that 1/3 = 0.3 repeater
double both sides and you get 2/3 = 0.6 repeater
triple both sides and you get 3/3 = 0.9repeater

3/3 = 1 0.9 repeater is less than 1

Like I said, i have pondered this question myself.

I have placed this question along with my reponse in another forum which is filled with serious mathematicians.
I will see if any of them respond.

Melody30 oct. 2013

+118730

0

whats 1.08 times 10 to the negative third power

Firstly, this is not a scientific notation question.

10 to the negative third power = 1/10 to the positive third power (which is the same as 1/cube root of 10 )

1.08 * 1/cube root of 10 = 1.08 / 10^(1/3) = approx 0.50129

Melody30 oct. 2013

+118730

0

Which of the following best describes the graph?

What following?
I don't think your question is complete.

Melody30 oct. 2013

+118730

0

|5(2/3)-8(5/6)|

|10/3 - 20/3 |

|-10/3|

10/3

3 and 1/3

Melody30 oct. 2013

+118730

0

(log of cubed route x) times y times z
=
(yzlogx)/3

Melody30 oct. 2013

+118730

0

Yes,
Matrices can be very useful.
I don't usually solve little equations that way.
But they are extremely useful when you have several equations with several unknowns.

Melody30 oct. 2013