Melody

921 Questions
34315 Answers

+1

1

1742

2

+118725

Mathigon website

I just discovered a site called mathigon

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

Melody Apr 2, 2022

-8

609

1

+118725

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

-2

8

1459

5

+118725

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 ..

●●●●●

Melody Mar 15, 2022

-3

871

3

+118725

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

-4

849

3

+118725

WELCOME BACK CPHILL !

Melody Feb 11, 2022

-5

717

2

+118725

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

-7

889

11

+118725

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 ..

●●●●●●●●●●●

Melody Jan 9, 2022

-6

1

996

3

+118725

HAPPY BIRTHDAY CHRIS!

Melody Dec 20, 2021

+5

16

5552

9

+118725

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

●●●●●●●●●

Melody Nov 4, 2021

-9

1091

1

+118725

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

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

MelodyNov 13, 2013

+118725

0

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

MelodyNov 13, 2013

+118725

0

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

MelodyNov 13, 2013

+118725

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.

MelodyNov 13, 2013

+118725

0

Now, that would depend on the question.

MelodyNov 13, 2013

+118725

0

What Is The Square Root Of 20

root4 * root5 = 2root5

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

MelodyNov 13, 2013

+118725

0

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

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

25x/1200 = 0

x=0

MelodyNov 13, 2013

+118725

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.

MelodyNov 13, 2013

+118725

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?

MelodyNov 13, 2013

+118725

0

Star gave you 2 numbers.

MelodyNov 13, 2013