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25 - 18.59=6.41

WHAT IS 5x=25

5x=25 divide both sides by 5

x=25/5

x=5

Log is short for "Logarithm".  In mathematics, the logarithm is the inverse operation to exponentiation. That means the logarithm of a number is the exponent to which another fixed value, the base, must be raised to produce that number. In simple cases the logarithm counts repeated multiplication.

Example: The log of 100 to base 10=2. 2 means the number of times you multiply 10 by itself to give you 100. So, because the log is 2, then it we multiply 10 X 10=100. It is written like this:10^2=100.

No......

A prime number is only divisible by itself and 1

0 is definitely not divisible by itself, but it is divisible by every other number except itself.

What's the square root of 25 ?
Is it 5 or +/- 5 and why ?

ALSO

Say it was + or -

then there would be no way of differentiating between

9+sqrt(25)   and    10-sqrt(25)

They would both have the same 2 answers    9 + or - 5   =   14 or 4 

Mon 28/12/15

Happy birthday Gino   

http://web2.0calc.com/questions/happy-birthday-gino3141

More great stories from Dragonlance    

http://web2.0calc.com/questions/a-christmas-story-from-dragonlance-s-journal

Great geometry brain tease   

http://web2.0calc.com/questions/whoever-finds-the-solution

Finding asymptotes of a hyperbola.    (Contined)   Thanks Gino3141, Alan and Guest.

https://web2.0calc.com/questions/i-need-to-find-the-asymptotes-of-this-hyperbola-x-2-2-121-y-5-2-81-1

Completing the squares.  Great answer from CPhill

http://web2.0calc.com/questions/completing-the-square_5860

Quintic Convergence of pi (continued)  Thanks Alan and Bertie    :)

http://web2.0calc.com/questions/quintic-convergence-of-pi

Difficult Integral

http://web2.0calc.com/questions/integral-e-arctanx-1-x-2-1-2

Ordinary differential Equation

https://web2.0calc.com/questions/ordinary-differential-equation

By convention, we take the principal root which is +5, unless we are solving an equation involving the roots of 25. Then, both roots [positive and negative] are taken.

Thus

sqrt(25)  = 5

But

x^2  = 25

Then, 

x  =  +/- 5

@@ What is Happening?  [Wrap4]   Sun 27/12/15   Sydney,  Australia Time 12:50 am   ♪ ♫

(really Mon)

Good day to you all :)

Today our answer credits fo to Alan, CPhill and mkord.  Congratulations !!   

Technical Issues:

How can you post a picture when the picture upload on the forum is not working properly ?

Thanks very much Alan for these instructions.

?

Today, Joaquín has 45 cents in his piggy bank and Marcy has 93 cents in her piggy bank. Starting tomorrow, Joaquín will add 6 cents to his bank each day and Marcy will add 4 cents to her bank each day. In how many days will the amount in Joaquín’s bank first be greater than the amount in Marcy’s bank?

Joaquin > Marcy

\(45+6n>93+4n\\ 45+6n-45>93+4n-45\\ 6n>48+4n\\ 6n-4n>48+4n-4n\\ 2n>48\\ n>24 \)

24 days AFTER the beginning they wil have the same amount.  I guess this could be described as the 25th day :/

So

The first day Joaquin has more is the 26th day.

40/54 = 0.7407 = 20/27.

20/27 finished the class.

This is a thread that I put together a very long time ago.

You may find it very helpful :)

Hi Solveit,

Azerbaijan is very exotic!  I bet many people on the fourm have never heard of your country and certainly would not know where it was.  I know Baku is the capital and it is on the west side of the Caspian Sea but that is about all I know. Are you from Baku?

Are you studying at an International School?  How come you are taking the SATs ?

AND

Welcome to the forum  MSKITA    

(0.9807)**10=0.8229

It depends which scientific calculator.  

It could be

9.807 [^]  10=       just as CPhill showed you

OR

9.807   [x^y]  10 =

They are the most common ways. :)

The [ ] means there is a button with the inserted writing on it  :)

No I have not heard from MathsGod for a long time.

It is not unusual that kids move on but his departure did seem very sudden.

I expect he is alright but I also would very much like him to return :(

I did thanks InjustaGod  

Thank you Melody, i really didnt think of those ideas.I will think more about what i have to become when i grow up. Thank you.

No i ghavent heard from mathsgod since a long time, thats why i just wish he is alright. have you?

Hello Rosala,

You really cannot take all the World's problems on your shoulders.

You are right, there are many people suffering horrible attrocities in many parts of the World.  There always has been since the begining of 'civilization'.  But there are also many people living in well adjusted, happy communities.  People like you and me.  There are many many of us.  The whole World is not suffering. 

If it were not for the vaste media network you would not even know about all these suffering people.  Some people have always suffered under tyranny and war but now their voices can at least, to a small extent, be heard.  

This means that the World at large can offer some tiny amount of help. It also means that people like yourself must learn to control their emotional responses to the knowledge of these terrible things.

Perhaps you could put your efforts into planning how you may help, either now, perhaps by fundraising, or more likely, in the future.  Perhaps you may consider becoming a doctor or a nurse and vulunteering your services when you are trained.   Or you could become a Laywer and help them by means of international Law.  Or you could be a builder or a farmer, or a great many onther professions where your services would be invaluable.  There are many things that you can do to help, but being miserable about it really does not help the suffering people at all.

Perhaps writing about it can help.  You like writing.  Perhaps you can become a journalist.  Your writing could make the voices of the sufferers heard just a little better, perhaps this may lead to others being able to help just a little bit more .........

--------

Have you heard from MathsGod at all?   I also hope that he is safe and happy and I would also really like him to return ://

Good evening Sir CPhill and ye faithful subjects.

The queen doth give Her royal Blessing for thou, Sir CPhill,  to take the boy Dragonlance as thine personal BS.  (Brigadere Squire)

The Queen  trusts that you have have instructed the boy properly on the great responsibility that will be bestowed upon him.

I see the duties of the Brigadere Squire hath already been defined and accepted by the boy. 

Further it seems that Dragonlance has already had much experience in BS detection so he does not come without skills.  

The Queen entrusts that said detection skills can be expanded and that the boy and Sisyphus soon find the ellusive Roman Zero.

Now tis time for the boy to be invested and to be put to work.  This idleness is not good for him.

Do you not hear the Queen !!

This audience is now at an end!!

tbh with you, no what about you?

Thanks but I need to know how to enter it on a  scienfic calculator?  What bottoms to press.Sorry if this is a elementary question. I am trying to teach myself probability.

Thanks, Alan......!!!!!

The denominator varies between 1 and 3  (finite positive numbers).  The numerator tends to infinity.  Infinity divided by any finite number is still infinite.

Pretty good.......how about you???