Melody

921 Questions
34315 Answers

-2

1731

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Mathigon website

I just discovered a site called mathigon

https://mathigon.org/dashboard
lee mas ..

Melody 2 abr 2022

-10

595

1

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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. lee mas ..

Melody 16 mar 2022

-4

1403

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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 lee mas ..

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Melody 15 mar 2022

-5

857

3

+118690

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

Fuera tema

Melody 13 mar 2022

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836

3

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WELCOME BACK CPHILL !

Melody 11 feb 2022

-6

707

2

+118690

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. lee mas ..

Melody 1 feb 2022

-8

870

11

+118690

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 lee mas ..

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Melody 9 ene 2022

-8

1

981

3

+118690

HAPPY BIRTHDAY CHRIS!

Melody 20 dic 2021

+4

1

5471

9

+118690

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 lee mas ..

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Melody 4 nov 2021

-10

1077

1

+118690

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

Fuera tema

Melody 29 oct 2021

+118690

0

T _n = T _n-1 + T _n-2 + T _n-3

Melody13 nov 2013

+118690

0

Do you need the same answer twice or would you prefer a different one this time?

Melody13 nov 2013

+118690

0

1^1, 2^2, 3^3, 4^4,..........

Melody13 nov 2013

+118690

0

http://www.stargazing.net/david/constel/magnitude.html

I think the web page says 1/15

But I will admit to knowing nothing about this stuff.

Melody13 nov 2013

+118690

0

Now, that would depend on the question.

Melody13 nov 2013

+118690

0

What Is The Square Root Of 20

root4 * root5 = 2root5

or do it on your calculator is an estimate is good enough.

Melody13 nov 2013

+118690

0

x/400+x/600+x/60=0

3x/1200 + 2x/1200 + 20x/1200 = 0

25x/1200 = 0

x=0

Melody13 nov 2013

+118690

0

Determine whether Point A (-5,8) lies on the circle whose center is Point C (1,2) and which contains the Point P (7,-4).

(x-1) ² + (y-2) ² = r ²

r ² = (distance PC) ²

r ² = (-4-2) ² + (7-1) ² = 36 + 36 = 72

so
(x-1) ² + (y-2) ² = 72

Now just plug in x=-5 and y=8 and see if it makes the equation true.
If it does then A is on the circumference of the circle.

Melody13 nov 2013

+118690

0

2x+1^3(6-x)= -3

2x+[ 1^3]*(6-x)= -3

2x+1(6-x)=-3

x+6 = -3

x = -9

Is this the question that you intended to ask?

Melody13 nov 2013

+118690

0

Star gave you 2 numbers.

Melody13 nov 2013