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thank you Alan 

Thank you alan, now its very clear 

around 7.5 miles (average person can walk 3 miles per hour)

you devide the decimal # by 1 eg: 0.75/1

but  you'll write that as a fraction eg:$${\frac{{\mathtt{0.75}}}{{\mathtt{1}}}} = {\frac{{\mathtt{3}}}{{\mathtt{4}}}} = {\mathtt{0.75}}$$

so 0.75 over 1.

then you multiply both top and bottom by 10 for every # after the decimal point like if you had 0.2 you'd do 0.2 time 10 in this case its 0.75 you'd do 0.75 times 100.eg so you'll have 75 over 100 because 0.75(100)=75 and 1(100)=100.

after ypu turned your decimals into fractions you compare them but make sure that both fractions have the same denominator than you can compare the size i hope that helped

If you fraction is a common fraction, such as  3/5,  change this into  3 ÷ 5  and get  0.6

Sometimes, when you divide, you will get a repeating decimal; for instance,  

     4/7  =  4 ÷ 7  =  0.571428571428...       Just use as much of the number as you need.

If you have a mixed number, such as  14 5/8,  turn the fraction part, the  5/8  into a decimal,  .625  and 

write it as:  14.625

Hi Quinn,

I have heard of an extended definition of factorial that does allow this but I have never used it.

From my knowledge base factorials belong to whole positive integers and 0 only.

5! means 1*2*3*4*5

What would 5.6! mean?    It means nothing to me.  

Thanks for answering unknown.       I'll give you 3 points for all the effort you put in. 

Lets look at what you have done.   

ok sorry if i get this wrong. i am not a math teacher and you may want to check my work.

equvilent equations means have the same varabiles, so solving for n will give you the answer.

lets get n by itself

-6n-20=-2n+4(1-3n)

take away 4 from both sides     You cannot do this because the 4 'belongs' to the bracket 

always simplify both sides individually first.

-6n-20=-2n+4(1-3n)

-6n-20=-2n+4-12n

-6n-20=-14n+4

8n-20=4

8n=24

n=3

If you substitue 3 into the original equation you will find that it works.  That is how you can check your answer.

  0.353 353 353 353 ...             x  100     =     35. 335 335 335 335 ...

If you want a common fraction, or a mixed fraction for your answer:

Let    n  =  35. 335 335 335 335 ...               Now, multiply by 1000 (becasue 3 digits repeat):

1000 n  =  35 335. 335 335 335 ...               Subtract the original number:

   -    n  =        35. 335 335 335 335 ...                                                                                                      --------------------------------------------

  999 n  =  35 300.

        n  =  35300 / 999

Substitute ignoramus, idiot, imbecile, or m***n; it's less retarted vocabulary.

Lee can frame        $$\frac{1\; cupboard }{x\; days}$$

Ron can frame  $$\frac{1\; cupboard }{x+4\; days}$$

So together they can frame    

 $$\\\frac{1\; cupboard }{x\; days}+\frac{1\; cupboard }{x+4\; days}\\\\
=\frac{(x+4)\; cupboard}{ x*(x+4)days}+\frac{x\; cupboard }{x(x+4)\; days}\\\\
=\frac{(2x+4)\; cupboard}{ x*(x+4)days}\\\\\\$$

Now we know that together they can fram one cupboard in 4 days so

$$\\\frac{(2x+4)\; cupboard}{ x*(x+4)days}\times \frac{4\;days}{1}=1 cupboard \qquad $NOTE: The days cancel out$\\\\\\$$

This gives the equation

$$\\\frac{(2x+4)}{ x*(x+4)}\times \frac{4}{1}=1 \\\\
\frac{4(2x+4)}{ x*(x+4)}=1 \\\\
4(2x+4)=x*(x+4) \\\\
8x+16=x^2+4x \\\\
x^2-4x-16=0 \\\\$$

$${{\mathtt{x}}}^{{\mathtt{2}}}{\mathtt{\,-\,}}{\mathtt{4}}{\mathtt{\,\times\,}}{\mathtt{x}}{\mathtt{\,-\,}}{\mathtt{16}} = {\mathtt{0}} \Rightarrow \left\{ \begin{array}{l}{\mathtt{x}} = {\mathtt{2}}{\mathtt{\,-\,}}{\mathtt{2}}{\mathtt{\,\times\,}}{\sqrt{{\mathtt{5}}}}\\
{\mathtt{x}} = {\mathtt{2}}{\mathtt{\,\times\,}}{\sqrt{{\mathtt{5}}}}{\mathtt{\,\small\textbf+\,}}{\mathtt{2}}\\
\end{array} \right\} \Rightarrow \left\{ \begin{array}{l}{\mathtt{x}} = -{\mathtt{2.472\: \!135\: \!954\: \!999\: \!579\: \!4}}\\
{\mathtt{x}} = {\mathtt{6.472\: \!135\: \!954\: \!999\: \!579\: \!4}}\\
\end{array} \right\}$$

The first  answer is invalid

So individually Lee can fram a cupboard in  6.47 days and Ron will take 10.47  days

Exactly the same as CPhill got.     These are really tricky.    

10 x 10  = 100

Please remove the word 'retard' from your vocabulary. 

Most calculators have a negative key that is separate from a minus key.

The calculator at this site, however, uses the same key for both.

8 x 1/2  =  4

(1/2)^2 - 4  =  1/4 - 4  =  1/4 - 16/4  =  -15/4

Now, you have:  (4) / (-15/4)  =  4 x 4/-15  =  - 16/15                   (To divide, multiply by the reciprocal.)

The answer is  -16/15  not  -15/16

-2  =  -2/1

-2/1 x 4/3  =  -8/3           (multiply the two numerators together  -2 x 4  =  -8  and multiply the two                                                         denominators together  1 x 3  =  3)

As a mixed fraction, it is  -2 2/3

-2*4/3=-8/3

If you have a right triangle, the tangent of each of the two non-right angles is defined to be the length of the side opposite the angle divided by the lenght of the hypotenuse.

14.14% is the percent for .1414

0.1414=14.14%

okay the original question is In a trilsupose a lawyerwants 2 men and 5 womento make up a special panel.if the 7 panel  menbers are selected at random fro a pool of 12 peoples,which istheprobality that the  lawyer will not get the desired panel?(sorry for i didnt write the question completelyand i got the anwser）

ok i got it know.Thank you for your help.

why 0!=1? can n be a negative or fraction in n! ?why or why not?

I'm not sure what the question is.

What is the question?

If the problem is 2.3436 x 10^60, then there are 5 significant digits, each of the digits of 2.3436 is significant; count the number of significant digits in the number, not in the exponent.

If the problem is 2.3436 x 60, then there is only 1 significant digit. The number with the fewest number of significant digits wins and 60 has only 1 significant digit because zeros at the end of a number do not count, unless you are specifically told that they do.

2.2 + (-3.7)  =  2.2 - 3.7  =  -1.5