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Melody
Username
Melody
Score
92781
Stats
Questions
850
Answers
25337
870 Questions
25857 Answers
+2
182
0
+92781
Interesting puzzle clip
I just watched this puzzle clip.
Some of you may find it interesting too :)
https://www.youtube.com/watch?v=dh4nEuhZBgg&feature=em-subs_digest
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off-topic
Melody
May 18, 2018
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Should you consider anything before you answer a question?
I would like answerers to think about why they are answering questions BEFORE they supply answers.
Are you seriously trying to help the asker to learn?
Are you mostly interested in showing your own cleverness or increasing your
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Melody
May 13, 2018
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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
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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
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Melody
Feb 1, 2018
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375
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+92781
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.
read more ..
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Melody
Jan 23, 2018
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415
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+92781
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
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I'm sorry but the question does not make sense.
Melody
Sep 29, 2013
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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
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What does BM stand for?
Melody
Sep 28, 2013
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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
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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
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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
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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
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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
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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
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It would be -1 because this is the only possible value for x
Melody
Sep 28, 2013
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