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

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I don't think that you usually talk about 3Dimensional figures having perimeters.
I guess you mean the combined length of all the edges.
It's regular so they will all be the same.
How many are there?
You can finish.

Melody20 nov. 2013

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In my Algebra class we are talking about Equations as Relations and I have this problem, 3-5x=2y and I'm not really sure how to solve it ?

You can't 'solve' it. If you have 2 unknowns (x and y) then you need 2 equations before you have any chance of solving.
You could graph it if you want to. It will be a straight line.

Melody20 nov. 2013

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(9r-3)+6 when r equals 3

Put a times sign between the 9 and the r
replace the r with the 3 (substitute in 3)
then work it out.

Melody20 nov. 2013

+118730

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I have assumed this question is in degrees.

asin(sin(120)*36)/45

The question as you have written it is unsolvable because you can only find asin of a number between -1 and 1
and sin(120)*36 is more than 1

Perhaps you mean
asin(sin(120*36))/45 ?

Melody20 nov. 2013

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On the calc I got 10,125.77133

Melody20 nov. 2013

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First the bottom cannot be equal to zero so you have to state what the pronumeral cannot be.
Then
multiply both sides of the equation with what is on the bottom with the pronumberal. That will get it off the bottom and onto the top of the other side.
eg
5/6 = 7/(x-2)
x-2 cannot be equal to zero so x not be equal to 2

5/6 * (x-2) = 7/(x-2) * (x-2)
5(x-2) / 6 = 7
etc

If you do you fractions upright it is much easier to see.

Melody20 nov. 2013

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Can you be more specific about what is confusing you?
Do you know how to label the sides of the right angled triangle?

Melody20 nov. 2013

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http://en.wikipedia.org/wiki/Quadratic_formula

You could have googled it for yourself it would have been quicker for you.

Melody19 nov. 2013

+118730

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r = (1/5)(ln 3)
r = 0.220
explained

This has just been done straight on the calculator

1 / 5 * ln 3 =

The calc answer is 0.2197...
Your answer has been rounded of to 3 decimal places or 3 significant figures (both the same in this case)

What is there to explain?

Melody19 nov. 2013

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how do I estimate (-0.173)(-8)

Maybe -0.2*-8 = 1.6 this will be a little big.

Melody19 nov. 2013