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Melody
Nombre de usuario
Melody
Puntuación
92194
Stats
Preguntas
848
Respuestas
25082
868 Questions
25591 Answers
+6
283
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+92194
A question for Alan.
Alan, I would like to know how to do MonteCarlo simulations.
I decided to ask publicly because maybe other people would like this too.
Can you show me or do I need a special program?
Thanks :)
lee mas ..
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Melody
07-feb-2018
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255
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Happy Birthday Heureka
A little message just told me it was Heureka's birthday yesterday!!
I hope you had a great day Heureka
lee mas ..
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Melody
01-feb-2018
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A trig exact ratio memory trick.
This trig memory trick from TheXSquaredFactor is really good.
It is for 'remembering' the sine and cosine of angles that most students are told to memorize.
lee mas ..
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Melody
23-ene-2018
+1
267
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Problems with LaTex
Latex has not displayed properly for a couple of weeks now.
Have other people had a problem or is it just my display?
For instance, this answer of Hectictar only displays as coding for me, it does not display as it should.
lee mas ..
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Melody
13-ene-2018
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257
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Testing image upload - told it was broken
image upload
Fuera tema
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Melody
08-ene-2018
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263
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HAPPY NEW YEAR !!
I wish for all members and guests to have a faulous 2018 year!!
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Melody
01-ene-2018
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338
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HAPPY BIRTHDAY GENO3141 !!!
From all the members of Web2.0. We wish you a really great birthday !!
lee mas ..
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Melody
27-dic-2017
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Merry Christmas everyone
Merry Christmas everyone
Here are some of our traditional Australian Christmas songs.
lee mas ..
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Melody
25-dic-2017
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HAPPY BIRTHDAY CPHILL
Happy birthday Forum Champ!!
We hope you have a super terrific day!!
lee mas ..
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Melody
19-dic-2017
+5
400
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Neat geometry question (repeat)
I just found this old question
https://web2.0calc.com/questions/isosceles-amp-equilateral-triangles-perimeter-and-area
lee mas ..
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Melody
13-nov-2017
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Maths Humour
A little maths humour. Thanks OBT
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Melody
08-nov-2017
+2
414
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Learning the periodic table
Learning the periodic table
I really like this video - it is the first in a set.
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Melody
27-oct-2017
+4
323
1
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Graphing challenge
Can you match the equation (the 'y=' is missing) to the graph???
https://www.sporcle.com/games/arcer/identify-the-graphed-functions
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Melody
21-oct-2017
+2
498
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Probability puzzles.
Here are some more probability puzzles.
1) If you break a stick in two places at random, forming three pieces, what is the probability of being able to form a triangle with the pieces?
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Melody
05-oct-2017
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#2
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You have to add up the 4 lengths and then divide by 4 to get the average.
Melody
29-sep-2013
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I think this question is in italian, I put it through a translator and this is what I got.
A trapezoid rectangle has the smaller base, the height and the oblique side respectively 9cm long, 4cm 5cm.sapendo cha and the projection of the oblique side on the basis mangiore is 3cm long, determine the extent of the perimeter
Unfortunately, I still don't understand the question. sorry.
Melody
29-sep-2013
#1
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I have no idea what your question means.
Can you explain yourself better?
Melody
29-sep-2013
#1
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With your fingers.
Melody
29-sep-2013
#1
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You could do it on your calculator if you have a fraction button.
otherwise
27 1/4 - 12 8/9
= 27 + 1/4 - (12 + 8/9)
= 27 + 1/4 - 12 - 8/9
= 27 - 12 + 1/4 - 8/9
= 15 +1/4 - 8/9
hopefully you will recognise that 1/4 is less than a half and 8/9 is more than a half. The first one needs to be the biggest unless you want to deal with negative numbers.
So I suggest you change 15 + 1/4 into 14 + 1 + 1/4 and, 1 and a quarter is 5 quarters.
so
=14 + 5/4 - 8/9
Now, you cannot add or subtract fractions unless the denominators (bottoms) are the same. You must find a number that 4 goes into and 9 goes into. 4*9 will work and in this case it is the smallest one.
So you will have to change it to 14 + something over 36 - something else of 36
and I am going to let you finish by yourself.
Happy puzzling.
Melody
29-sep-2013
#1
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How much does an atom of iron weigh? I guess you could google this just as easily as I could. Cheers.
Melody
29-sep-2013
#1
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Just convert the km to metres and do the division on your calculator. The units cancel out. the answer will just be a number.
or
You could convert the metres to km and do the division. The answer will be the same.
Melody
29-sep-2013
#1
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The probability of getting at least one heart is the compliment of getting no hearts.
What I mean is, you either get a heart or you don't so the sum of these 2 probabilities is 1.
All probabilities are between 0 and 1 (0 = can't happen) (1 = must happen)
The probability that the first chosen is not a heart is 48/52
now there are only 51 cards left and only 47 of them are not hearts so
The probability that the second chosen is not a heart is 47/51 etc
So
The probability that none are hearts is
P(no hearts) = 1 - [ 48/52 * 47/51 * 46/50 * 45/49 ]
I hope that you LEARN from my answer.
Melody
29-sep-2013
#1
+92194
+5
Firstly what is bidmas? Do you mean BODMAS ? If you mean bidmas please tell me what the i stands for?
BODMAS stands for
Brackets then
of (as in power of) then
division and multiplication equally important just work left to right then
addition and subtraction equally important just work left to right
Your first question is so easy that I am sure you can do it yourself. Just try putting the brackets in different places until it works.
The second one is a bit tricky. What i will tell you is that it is not 4 squared. There is only one place that you can put the first brackets to change this. There will be 2 sets of brackets altogether.
good luck. Happy puzzling
Melody
29-sep-2013
#1
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Without any brackets this expression is really
=35000 * x^2 - (x / 200) * x
=35000* x^2 - x^2 / 200
=x^2 * (35000 - (1/200))
=34999.995 * x^2
Melody
29-sep-2013
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