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Melody
Username
Melody
Score
90227
Stats
Questions
831
Answers
24296
849 Questions
24760 Answers
+1
34
5
+90227
PUZZLES
I think it is time for us to have a new puzzle thread
THIS THREAD WILL BE AVAILABLE IN THE STICKY TOPICS
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Melody
Sep 24, 2017
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LaTex Coding
LaTex is a mathematics presentation language that can be used on this forum.
It is used in many other places as well.
This can be very confusing when you first use it but if you start with little things like using it to write
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Melody
Sep 21, 2017
0
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How to upload a picture
Please use this hyperlink to see instructions.
https://web2.0calc.com/questions/instructions-on-uploading-pictures#r4
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Melody
Sep 16, 2017
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Have you had login problems - please comment
I have just been informed that a member is having problems signing in lately.
I'd like to know if anyone else has had any problems?
Could you please comment - especially if you to have had problems.
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Melody
Aug 1, 2017
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Repost: I am interested too.
Helperid bought my attention back to this question.
https://web2.0calc.com/questions/very-hard-math-question-for-my-profile-picture
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Melody
Jun 24, 2017
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Ein großes Willkommen bei deinen beiden neuen Moderatoren!
On behalf of everyone I would like to thank admin and congratulate Omi67 and asinus on becoming moderators for the web2.0calc German forum today.
This forum has had little moderation for some time
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Melody
May 21, 2017
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A big welcome to our two new moderators.
On behalf of everyone I would like to congratulate Omi67 and asinus on becoming moderators today.
They will mainly be moderating the German forum but they will be able to moderate here as well.
I thank you both
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off-topic
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Melody
May 20, 2017
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511
3
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Some music to share :)
I enjoy listening to many different types of music from all over the world.
I would like to share what I am listening to now.
Maybe someone would like to listen to something that they might not have heard before.
It is just a song
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off-topic
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Melody
May 3, 2017
+1
340
13
+90227
Birthdays
Anniversary - Birthday Dates
The original post can not longer be edited so I am making a new one.
Original post: https://web2.0calc.com/questions/birthdays
Some members are no longer active but I have kept most in.
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Melody
Apr 25, 2017
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MysticalJayCat's belated birthday
Oh Dear !
We missed MysticalJayCat's birthday!
I am so sorry MJ !
I am baked you a cake :)
read more ..
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Melody
Apr 24, 2017
+5
384
3
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Reference material thread and 3D graphing calc.
I have just been asked, by member DrNourian, to include this 3D graphing calculator reference
to our "Reference Material" thread which can be found in the sticky topics on the right of the page.
This is a direct
read more ..
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Melody
Apr 5, 2017
+3
699
8
+90227
@ Problems with the forum as of 25/3/17
Hi everyone,
I have seen a lot of individual complaints posted. I have also noticed that Admin has been seeing at least some of them and has been repairing the problems. Thanks Admin :)
Anyway, I thought it would
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Melody
Mar 25, 2017
+4
416
3
+90227
I am not familiar with the notation for these questions.
I am not familiar with the notation for these questions.
So I am interested in the answer if someone knowledgable would like to take a look . ://
http://web2.0calc.com/questions/coordinates-question
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Melody
Mar 4, 2017
-1
297
2
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Melody's interest posts (1/3/17)
My interest posts list is exploding so I am going to put some of them here ://
Other people can do this too if they want to.
Just make it clear what you are doing. :)
read more ..
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Melody
Mar 1, 2017
+20
1694
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@ Is PROCRASTINATION a problem for you ?
Hi everyone,
I am getting some information from a couple of different members.
HighSchoolCalculus (HSC) found this you tube clip.
It is quite humourous and thought provoking.
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hectictar
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Melody
Feb 25, 2017
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#1
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I'm sorry but the question does not make sense.
Melody
Sep 29, 2013
#1
+90227
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
+90227
0
What does BM stand for?
Melody
Sep 28, 2013
#2
+90227
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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
+90227
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
+90227
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
+90227
0
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
+90227
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
+90227
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
+90227
0
It would be -1 because this is the only possible value for x
Melody
Sep 28, 2013
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