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Maybe because that you got reported a certian amount of times? like some bullies report people for no reason

wasting lots of sticky notes i finally got it 

\(\frac{x+7}{(x-2)(x+1)}=\frac{A}{x-2}+\frac{B}{x+1}\) now mulitply (x-2)(x+1) on both sides

\(x+7=Ax+A+Bx-2B\) trying an example of x, i use 0 which gives

\(7=A-2B\) and do another that is 4

\(11=5A+2B\) the I add both equations together

\(18=6A\) which leaves us with A=3 plugging this into the equation

\(7=3-2B\) and so B equals -2 leaving us with 

the ordered pair for (A,B) as \(3,-2\)

EP: That is correct, provided they accept revesal of 10 of those numbers that end in zero, such as:

400 - 004 =396, 450 - 054 =396....etc. if they are not acceptable, then there are only 50 such numbers.

Scroll down the page labelled Answers.  You can see it there.

Hmm, not quite!  if you let x go to infinity then you get 0 = 0.

Let x go to 0 is fine.  Probably better to let x go to 1 rather than infinity for another choice though.

If you let x go infinity, then you get 0 = A + B.

If you let x = 0, then you get -7/2 = A/(-2) + B.

The solution to this system is then A = 7/3, B = -7/3, so (A,B) = (7/3,-7/3).

You can search up what a "solid of revolution" is on google.  You should be able to watch some videos on it so you can learn what it means and how to solve problems with this information.

You have rolled a die 5 times, which is the same as rolling 5 dice once. Each die is numbered from 1 to 6. What combinations of the 6 numbers will give you a product of 1200?
Well, the only ones that work are: 2 x 4 x 5 x 5 x 6 and 3 x 4 x 4 x 5 x 5. Now, how many DISTINCT permutations can you get out of the 5 numbers, bearing in mind that you have 2 fives and 2 fours?

Oh I had one of those posts that didn't get an answer.  I found it out myself though. 16sqrt3/3 I knew that I did it but it took me five minutes to find it lol

The 20 original trailers are now an average of 20 years old, and the \(n\) new trailers are all 2 years old. There are \(20+n\) trailers, and the sum of their ages is \(20\cdot20+2n\). This gives us the equation

\(\frac{400+2n}{20+n}=14, \) 

which we solve like this: 

\(\begin{align*} 400+2n &= 14(20+n) \\ 400+2n &= 280+14n \\ 120 &= 12n \end{align*}\) 

We find that there are \(n=10\) new trailer homes.

(Source: AoPS Alcumus)

sumfor(n,1, 502, (4*n - 1)^2 =675,706,558

Here is what I THINK:

xyz  -  zyx = 396

100x  + 10 y   + z    -    100z - 10 y - x = 396

99x - 99z   = 396

99(x-z) = 396

x-z = 4

x  can be        9    8    7   6    5 

z would be      5     4    3   2   1 

    y can be anything 0-9

5 x 10 = 50                                       edited   I had 4 as a possible for x   but it isn't a possible

Your answer is as good as mine !  

Oh wow! Great work! Wow you also beat me to solving this! I'm not very sure about my answer...

Not sure about this, but first, find the area of the circle (121 pi). Then, because it is a 300 degree arc, the part you want to find is 5/6 of the circle. This would then be (121 pi)(5/6), which would be easy to solve.

A complete circle is 360^o     we want the area of a   300/360 fraction of the complete circle

Area = pi r^2

        = 300/360  * pi * 11² === ...........   mi ²

To solve this equation:

(1-2)+(3-4)+...+(2013-2014) = -1(x) you can figure it out from here.

WHAT ARE THE FOUR INTEGERS?  Um happy now?

Draw a diagram to get a bette mental picture

  then  tan 27 = 630/ d        where d is the distance along the highway

Y = mx + b       'b' is the value when it croses the y axis      -6

m is the slope     find two convenient points to calculate slope     (y1-y2) /(x1-x2)

                                    two good points would be    -8, -4         and       4 , -7 

Cos 71   =   AB / hyp

cos 71 = 6.3 / BC       solve for BC

Um... is this supposed to be a question?

Well, for substitution, it's very simple:

3x + 6(-5) = -18

3x + (-30) = -18

3x = 12

x = 4

Then, for elimination it would be:

(-7x + 9y = -19)

+ (4x -9y = 10)

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

-3x = -9

x = 3

And finally, for the other elimination:

(-5x + 8y = -4)

+ (6x - 8y = -12)

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

x = -16

I am not sure if this is the "right" kind of elimination, but it works!