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Melody
Имя пользователя
Melody
Гол
118690
Membership
Stats
Вопросов
900
ответы
33647
921 Questions
34315 Answers
-2
1731
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+118690
Mathigon website
I just discovered a site called mathigon
https://mathigon.org/dashboard
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Melody
2 апр. 2022 г.
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595
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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.
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Melody
16 мар. 2022 г.
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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
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Melody
15 мар. 2022 г.
-5
858
3
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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
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Melody
13 мар. 2022 г.
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WELCOME BACK CPHILL !
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Melody
11 февр. 2022 г.
-6
707
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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.
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Melody
1 февр. 2022 г.
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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
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Melody
9 янв. 2022 г.
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1
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HAPPY BIRTHDAY CHRIS!
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Melody
20 дек. 2021 г.
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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
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Melody
4 нояб. 2021 г.
-10
1077
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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
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Melody
29 окт. 2021 г.
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There is a formula but I don't use it and I can never remember what it is because it is not necessary.
I'd just say (40/360)*2pi*r = 3000
Then just solve the equation.
Melody
7 окт. 2013 г.
#3
+118690
0
Guest's Google translation - Russian to English
"First you say that that is the currency of "4106011" if "4106011" is in Russia, the Russian dollar "$ 127,635" and cents "0,35" ¢."
Hey Kem,
What does BTC stand for?
Melody
7 окт. 2013 г.
#1
+118690
0
Minimization prob.jpg
Melody
7 окт. 2013 г.
#1
+118690
0
if cscθ = x+6/x-2 and ctnθ = x+5/x-2 find θ
Hi Diaanaa,
I am having problems with your question.
Before I try further I just want to make sure that you meant
If Cosec(theta) = x + (6/x) - 2
and cotangent(theta) = x + (5/x) - 2
find theta
(We dont use the shortened versions csc and ctn in Australia, we use cosec and cot)
Please let me know if my interpretation of the question is correct.
Melody
7 окт. 2013 г.
#1
+118690
0
Probabilities must be between 0 and 1 inclusive
If something cannot happen, the probability is 0
If something has to happen the probability is 1
So you probability of 3 doesn't make any sense.
Maybe you meant P(black or gold) = 3/7
There are 9 marbles that are either black or gold
Let there be x white marbles.
So the number of marbles altogether is 3+6+2+6+x = 17+x
so 9/(17+x) = 3/7
Now just solve it as a little equation to get the value of x.
Melody
7 окт. 2013 г.
#1
+118690
0
no it doesn't have to be
example
root12 and root3 are both irrational but
root12/root3 = 2
Melody
7 окт. 2013 г.
#1
+118690
0
Divide both sides by 2
Subtract 6x from both sides
Divide both sides by the number in front of the x (the x coefficient)
the answer will be negative.
Melody
7 окт. 2013 г.
#4
+118690
0
The number of ways 5 numbers can be selected from 54 is
54C5 = 54!/(5!*49!) = 3162510
The number of ways you can select 4 things from 5 is 5C4 = 5
So the probability of being a small fry winner is 5/3162510
The probability of being any winner is 6/3162510
Melody
7 окт. 2013 г.
#2
+118690
0
This is an irrational number unless your base is some power of 5 so the the best exact answer is
0.34log5
Ans yes, if you want an estimate and it is base 10 or base e do it on your calculator.
Melody
7 окт. 2013 г.
#1
+118690
0
Sorry, your question does not make sense.
Melody
7 окт. 2013 г.
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