Melody

Thanks Bertie, it is really good to see you. :)

I could see that there was no unique solution but I did not know how to work out the general solution.

Can you show me how to do it?

I am not at all good with hyperbolas  

By the way, do you use Firefox as your browser?

and

Have you tried logging on using a different browser?

Why didn't you just do them on a calculator?

C(100,3)

on most hand held calcs it is just     100   [nCr]   3 =

On the web two calc you can type in

nCr(100,3)=

Alas anonymous4338, the Troll doth bring much hardship.  

He threw 2 of our most welcomed guests into the ravine last week.

He said their fresh bath scent was polluting the stench he works so hard to maintain.

Tis lucky you be a member, an anonymous member may be even less at risk.  Tell me 4338, since thee are anonymous why doth thou have a name ???  

Tis not of concern, we remember you with affection 4338.    

Wed  20/1/16

1)  A forum history trip, complete with lots of comedy.  Coldplay has been doing some archeological digging.

     Thanks so much Coldplay, these old posts are great!

      http://web2.0calc.com/questions/dear-forum-members

2)   Understanding fractions - beginner equation...  Thanks guests and Melody

     http://web2.0calc.com/questions/please-don-t-give-the-answer-just-give-the-wokings

3)  Find the angle in the circle.     Melody

     http://web2.0calc.com/questions/a-central-angle-in-a-circle-of-radius-4-m-is-subtended-by-an-arc-of-length-5-m-find-the-measure-of-in-degrees-and-in-radians-degrees-round-your#r1

4)  If x is doubled by what factor does y increase?   Thanks Heureka

      http://web2.0calc.com/questions/y-3-4x-2

5)  How many ways can people sit around a table - with restrictions.   Thanks CPhill and Melody

     http://web2.0calc.com/questions/in-how-many-ways-can-we-seat-7-people-in-a-round-table-with-a-certain-3-people-not-in-consecutive-order#r2

6)  How high is the ceiling?    Thanks CPhill

     http://web2.0calc.com/questions/trigonometry-word-question

Repeats from last time:

7)  Find the hyperbola        Thanks Bertie          

     http://web2.0calc.com/questions/write-the-equation-of-hyperbole-which-is-tangent-with-the-straights-5x-6y-16-0-and-13x-10y-48-0_1

8)   The headache of slow clocks.     Heureka has offered a great answer, Thanks Heureka   

         http://web2.0calc.com/questions/clock

@@ What is Happening?  [Wrap4]   Tues 19/1/16   Sydney,  Australia Time 1:55pm   ♪ ♫

Hello everyone,

Answerer credits are awarded to CPhill, Solveit, EinsteinJr, Heureka, Coldplay, DragonLlayer554, Will8537, geno3141, and Anonymous4338.  A very big thankyou to each of you :)  

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.

Communications and Fun

1)   PLEASE be CONSIDERATE of other users.          

a not equal to 0  and

1)      2^x+y=0

         y= -2^x

2)    2^x-y=0

        y= 2^x

Am I not understanding the problem ?

There are no simultaneous solutions.

I can't stop laughing!

My sides are hurting!

The mutt desires me, Headmistress of Web2 academy, sister to  Guinevere,  Queen of the Magical Realm of Camelot to anoint him with expressions of undying love !  

Hahahahaha......

If thee were not such a endearing cur I would banish thee to the ‘naughty corner’ for 20 necrons ! 

If the Queen knew of this she may very well have Sir CPhill string you up from the highest branch of the tallest tree.

However you are risible, rather like your master, Chiurgeon Morgan Tud, and you are are not a man but a dog that knows no better.  So I will send you off with a slap on the nose, a flea in your ear and your tail between your legs.  

Be off with you and do not return until you learn to be respectful !

Ms. Melody

Headmistress of Web2 academy.

can someone please tell me how can i find the roots in these  9x^4+16x^3-76x^2-8x+32=0 numerically? since i was told it can't be done algebraically.

Can you do any calculus?

Just looking at it I can see it cannot have more than 4 roots.

You could just plug in some points to start with and see if you can find some negative and some positive.

If you do find one neg and on pos than there must be a zero(root) iinbetween.

You could then narrow it down - Ir would be good to use Newton's method of approximation here.

Really it is hard for me to tell you the best methos because I do not know wht you knowledge base is.

Drawing the graph with a graphing program like  Will and Heureka have done is a good idea.

The zeros is where it crosses the x axis. :)

how to convert a mark out of 90 to out of 10?

If you divide 90 by 9 you get 10

So

If you divide your mark out of 90 by 9 you will bet you new mark out of 10  :)

That is

Divide by 9

-----

I think CPhill misinterpreted your question. :/

Yes it is Dragon but can you answer it?

whats _:12= 7:14

\(\frac{x}{12}=\frac{7}{14}\\ \frac{x}{12}=\frac{1}{2}\\ 12*\frac{x}{12}=12*\frac{1}{2}\\ x=6\\\)

I really did not need to make it look so complicated.

7/14 is   1/2

and 6/12 is the same as a half 

so

the missing number is 6