Melody

Mmm some numbers are just sad and lonely.

As TM just pointed our, 13 can never be paired off.    

13 is a loner, he can never work in any groups.  

He is like an octopus.

Did you know that the octopus is an extremely intelligent creature and it is very capbale of learning by copying another of its species.  BUT in nature they live solitary lives so they never learn from one another and hence they can never advance.

Perhaps advancement is not that important.  If an octopus feels emotion, perhaps it is happy, I do not know.  But I do know that in some respects it can be compared to our prime number 13.

Dragonlance caught you napping on that one Chris.  LOL

It is good to see you back on the forum Dragonlance. :)

3-x  cannot be simplified.

Wed  18/11/15

1)  Quarters and nickels

http://web2.0calc.com/questions/money-and-percents#r1

2)  Omi57's pic should bring a smile to everybody's face :))     Thanks Omi67

http://web2.0calc.com/questions/a-tree-casts-a-25-foot-shadow-on-sunny-day-if-the-angle-of-elevation-from-the-tip-of-the-shadow-to-the-top-of-the-tree-is-32-degree-what-is-the-height-of#r3

3) Complex plane

http://web2.0calc.com/questions/complex-plane#r3

Ok so mine is correct for the question that I answered.

A question to the asker.

Why would you write exp if you meant 'e' ?

They are not the same thing at all !!

Thank you Alan :)

@@ What is Happening?  [Wrap4]   Tues 17/11/15   Sydney, Australia Time 8:32pm  ♪ ♫

Good evening to you all,

We have had some wonderful answers from Meghara, CPhill, Heureka, DoctorNewton, Omi67, LordEnedar, Rom, Alan and TMga2yb.  A big thank you to each of you.  

Forum Issues:

I have sent a letter to Mr. Massow today discussing the new forum and addressing some of the problems that we are having. Mr. Massow is the owner and developer of web2.0calc.com. In particular I talked about the access problems that some people are experiencing and our need for a reliable search function to search for a member's posts. I did discuss other issues as well and 

I gave Mr. Massow the address of the forum thread where various issues have been discussed over this past week.  I will let you know if there are any further developments in regards to this.

Interest Posts:

If you ask or answer an interesting question, you can private message the address to me (with copy and paste) and I will include it.  Of course only members are able to do this.  I quite likely will not see it if you do not show me.  

1) Calling our comedian TROLLS to return.    Continued.  

     Please, this place needs an injection of comedy.    

Alan, could you please what is wrong with my logic ?

That is easy, anything divided by 1 stays the same.      

-i /1 = -i

y^2-81/25y+225 ÷ y-9/45

(y^2-81)/(25y+225) ÷ (y-9)/45

if this is what you mean it would look like this - The fraction line replaces the brackets.

\(\frac{y^2-81}{25y+225} ÷ \frac{y-9}{45}\)

Is that what your question looks like?

--------------------

ok I will assume that it is.

\(\frac{y^2-81}{25y+225} ÷ \frac{y-9}{45}\\ =\frac{y^2-81}{25y+225} \times \frac{45}{y-9}\\ =\frac{(y-9)(y+9)}{25(y+9)} \times \frac{45}{y-9}\\ =\frac{(y+9)}{25(y+9)} \times \frac{45}{1}\\ =\frac{1}{25} \times \frac{45}{1}\\ =\frac{1}{5} \times \frac{9}{1}\\ =\frac{9}{5} \\ =1\frac{4}{5} \\\)