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Melody
Username
Melody
Score
91773
Stats
Questions
847
Answers
24930
867 Questions
25425 Answers
+1
78
6
+91773
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 :)
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Melody
Feb 7, 2018
+7
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+91773
Happy Birthday Heureka
A little message just told me it was Heureka's birthday yesterday!!
I hope you had a great day Heureka
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Melody
Feb 1, 2018
+1
104
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+91773
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.
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Melody
Jan 23, 2018
+1
148
13
+91773
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.
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Melody
Jan 13, 2018
0
113
15
+91773
Testing image upload - told it was broken
image upload
off-topic
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Melody
Jan 8, 2018
+5
164
4
+91773
HAPPY NEW YEAR !!
I wish for all members and guests to have a faulous 2018 year!!
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Melody
Jan 1, 2018
+2
211
5
+91773
HAPPY BIRTHDAY GENO3141 !!!
From all the members of Web2.0. We wish you a really great birthday !!
read more ..
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Melody
Dec 27, 2017
+4
201
12
+91773
Merry Christmas everyone
Merry Christmas everyone
Here are some of our traditional Australian Christmas songs.
read more ..
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Melody
Dec 25, 2017
+7
213
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+91773
HAPPY BIRTHDAY CPHILL
Happy birthday Forum Champ!!
We hope you have a super terrific day!!
read more ..
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Melody
Dec 19, 2017
+5
302
2
+91773
Neat geometry question (repeat)
I just found this old question
https://web2.0calc.com/questions/isosceles-amp-equilateral-triangles-perimeter-and-area
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Melody
Nov 13, 2017
+10
277
6
+91773
Maths Humour
A little maths humour. Thanks OBT
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Melody
Nov 8, 2017
+2
295
3
+91773
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
Oct 27, 2017
+4
234
1
+91773
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
Oct 21, 2017
+2
373
4
+91773
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
Oct 5, 2017
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#1
+91773
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I'm sorry but the question does not make sense.
Melody
Sep 29, 2013
#1
+91773
0
What is the absolute value of 9?
What is the absolute value of -9?
There are 2 possible equations to make the problem true.
So, there are two answers.
I don't actually want to do it all for you.
Is this enough help?
Melody
Sep 29, 2013
#1
+91773
0
What does BM stand for?
Melody
Sep 28, 2013
#2
+91773
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The square root of 5 is an irrational number so it cannot be written exactly as a fraction or a decimal. It can only be estimated.
Melody
Sep 28, 2013
#1
+91773
0
Initially y dash = 50*sin 53.1 degrees x dash = 50*cos 53.1 degrees
y=0 x=0
ongoing
y"=-g (I'll use -10) x"=0 ignore wind resistance
y' = -10t + 50sin 53.1 x'= 50*cos53.1
y= -5t^2 +(50sin53.1)*t x= (50cos53.1) *t
When y = 25
just substitute into the appropriate equation and solve with a quadratic equation.
I got 7.31 sec and 0.68 secs but I might have made a mistake.
This is enough to get you started. hope it helps.
Melody
Sep 28, 2013
#1
+91773
0
I am not going to do the whole question for you but i will try to explain.
If g(x)=3*t - 6
then g(2) would equal 3*2 - 6 = 0
g(-4) = 3*(-4) - 6 = -18
g(a) = 3*a - 6
Just replace the original thing in the bracket with the new thing in the bracket.
Melody
Sep 28, 2013
#2
+91773
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I'm sorry, I don't get what Scott is saying although it would be easier to follow if this site allowed maths type.
Any way the question can only be answered if the original log is base e. So I will assume that.
log e^x = xloge = x*1 = x
So log (base e) of e^(2x+2) = 2x+2
The problem becomes 2x+2 = 7 The answer is x = 2.5
Melody
Sep 28, 2013
#1
+91773
0
This is a region, there are an infinite number of answers.
First graph 5x+7y=57 It will be a dashed line because the less than sign is used.
then test a point (0,0) would be good.
If it satisfies the equation you shade in that side of the line, if it doesn't you shade in the other side.
Hope this helps.
Melody
Sep 28, 2013
#1
+91773
0
There is no solution to this equation.
You are asking when does 5x-55 = 5x+9
This will be true when -55=9, in other words it will never be true.
Melody
Sep 28, 2013
#1
+91773
0
It would be -1 because this is the only possible value for x
Melody
Sep 28, 2013
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