All Answers 358407 Answers

x^2 + x - 10 = 0   this won't factor....using the onsite solver, we have

$${{\mathtt{x}}}^{{\mathtt{2}}}{\mathtt{\,\small\textbf+\,}}{\mathtt{x}}{\mathtt{\,-\,}}{\mathtt{10}} = {\mathtt{0}} \Rightarrow \left\{ \begin{array}{l}{\mathtt{x}} = {\mathtt{\,-\,}}{\frac{\left({\sqrt{{\mathtt{41}}}}{\mathtt{\,\small\textbf+\,}}{\mathtt{1}}\right)}{{\mathtt{2}}}}\\
{\mathtt{x}} = {\frac{\left({\sqrt{{\mathtt{41}}}}{\mathtt{\,-\,}}{\mathtt{1}}\right)}{{\mathtt{2}}}}\\
\end{array} \right\} \Rightarrow \left\{ \begin{array}{l}{\mathtt{x}} = -{\mathtt{3.701\: \!562\: \!118\: \!716\: \!424\: \!3}}\\
{\mathtt{x}} = {\mathtt{2.701\: \!562\: \!118\: \!716\: \!424\: \!3}}\\
\end{array} \right\}$$

It's just C(9,5) = 9! / [(9-5)! * 5! ] = 9! /[4! * 5!] = [9 x 8 x 7 x 6] / [ 4 x 3 x 2 x 1] =

[3 x 2 x 3 x 7] = 126 ways

We are trying to solve

27*∑ (1/3)^(n-1)   from 1 to n =  364/9

WolframAlpha shows that 6 terms are needed

Here are the sums from n = 1 to n = 6

27 + 9 + 3 + 1 + 1/3 + 1/9 = 364/9

30%= 9,000

40%= 12,000

2 x 630=1260m= 1.26km

$$\\\frac{2}{8}\div\frac{5}{9}\\\\
=\frac{2}{8}\times \frac{9}{5}\\\\
=\frac{\not{2}*9}{\not{8}^4*5}\\\\
=\frac{9}{20}\\\\$$

You need paired data to find a corelation coefficient so this doesn't make any sense to me either. 

You cannot really 'solve' it because there are an infinite number of solutions.  

@@ End of Day Wrap  Sat 24/1/15     Sydney, Australia      Time 1:10 am   (Really Sun morning)

Hi everyone,

Our great answerers today were Alan, CPhill, Heureka, Tetration, Sasini and Geno3141.  Thank you  

Tetration has taught me how to use Hyperlinks in here.  Thanks Tetration     

Maybe other people use them but I have not noticed before.  When you write a post there is the ribbon at the top.  The furthest button to the right is a linked chain.  (It looks a bit like a pair of specs)

Just click on that.

There are 2 input boxes.  One is where you paste your copied web address and the other is where you write what you want it to be called.  It is very simple.  The hyperlink does not work while you are in edit mode, but it works fine in the published post.

I have used it for some of the interest posts so that you will see how it works.    

Interest posts:

1) Quadratic simultaneous equation pizza problem 

5x + 10y =40(5.50)

x  + 2y   = 8(5.50)

x  + 2y   = 44.00

x  + 2y - 44 =0

we can set this as y= mx +c

so,

x+ 2y =44

2y = -x -44

y   =-1/2x -44

Now we can draw a graph that formula. and we can solve this formula

pls can you be more clear with what you are asking?

2.25 =x*1.5%

2.25 = x*1.5/100

2.25 *100 =x*1.5

225/1.5    = x

150          =x

Sun 25/1/15

How to count Cos(13(deg)34(min)45(sek) using this soft?

First make sure the web2 calc is set to degrees - there is a toglle button on the bottom left of the calc.

cos(13+34/60+45/3600)

$$\underset{\,\,\,\,^{\textcolor[rgb]{0.66,0.66,0.66}{360^\circ}}}{{cos}}{\left({\mathtt{13}}{\mathtt{\,\small\textbf+\,}}{\frac{{\mathtt{34}}}{{\mathtt{60}}}}{\mathtt{\,\small\textbf+\,}}{\frac{{\mathtt{45}}}{{\mathtt{3\,600}}}}\right)} = {\mathtt{0.972\: \!046\: \!436\: \!409}}$$

volume =height* weight* length

           = 27 * 19 * 6 cm^3

           = 3071 cm^3

Your answer is just

4 x 17 x 30.......????

1+1+1+1*0+1

1+1+1+0+1

4

that's a simple question dr

Ah....I see...sorry!!

Yep...nice one, Sasini....!!!

Anon, you interpreted this the same way as I did.

I think that formula I wrote may be correct but I have not idea how to solve it.

Even Wolfram|Alpha did not solve it !

I think the question was very poorly written.    

Well, I am very please that you are using graphics anyway   

okay, not a problem Tenacious 

An excellent answer Sasini.   

Thanks, Melody......to be honest...I don't even know if this is exactly the correct answer, or not...I just kind of "winged it."