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-3 + 4x

        3    <8

Is this question related to acceleration? If so, you have to choose two points on the line and get the slope by doing rise/run or $$\frac{\Delta{Y}}{\Delta{X}} = \frac{Y2 - Y1}{X2 - X1} = slope.$$

(2+2)/(2*2) = 4/4 = 1.

To simplify this, you can do the following:

$$\frac{9 - 4x}{-3} = \frac{9}{-3} + \frac{-4x}{-3} = \mathbf{-3 + \frac{4x}{3}.}$$

(x^2 + 7x + 10) 

Factor out: (x+5)(x+2).

It is a building from WarCraft (PC game by Blizzard) and moon wells are constructed so that more units (footmen, riflemen, etc. for the human race) can be built and more upgrades as well. So, moon wells are like information and they are needed to expand your army. This question needs to expand as well to provide detailed information.

-1x - 2x = -3x

1 eV = 1.60217657 × 10^-19 joules

8.5 eV = 8.5*1.60217657 × 10^-19 joules = 1.36185 x 10^-18 J

Graphically, it looks like this:

AB is the segment of interest.....notice that the "distance" is just the hypoteneuse of a right triangle.......!!!!

Thanks for that answer, Alan........very imformative !!!

It looks like you "tricked" the calculator by using the permutation function!!!

Nice work......

What does this look like graphically? 

Look up Snell's law.  

This is what I get:

First, subtract the x values - in any order - and square the result

(-5-3)² = (-8)² = 64

Then, subtract the y values - in any order - and square the result

(-3-9)² = (-12)² = 144

Add the two results

64 + 144 = 208

Take the square root of this

√208 =√( 4*52) = √(4*4*13) = √(16*13) = 4√13 ....or......about 14.42, if you prefer...

is there any law for refraction ! ? 

yes ... nice my friend .. 

I will read more about refraction 

(2.3m^2+1.5n^2)^2 =

(2.3m^2+1.5n^2) (2.3m^2+1.5n^2)  =

5.29m^4 + 6.9(m^2*n^2) + 2.25n^4

WOW!that was so nice ND!i'll give u a point for that!

but i cant leave CPhill!so one for u as welll!

$$\begin{tabular}{c*{6}{@{\,}c}}
& & & & 8 & 6 & 0\\
\times & & & & & 2 & 5\\
\hline
& & & 4 & 3& 0& 0\\
+ & & 1 & 7 & 2 & 0 & 0\\
\hline
& & 2 & 1 & 5 & 0 & 0
\end{tabular}\\\\$$

21,500 miles

25 x 860 = 21500 miles

 you mean 194 watt not 192 ... right ? 

You are correct. (The value depicted is a typographical error) A correction is noted.

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what about the refractive  !! why the red is the least 

One (sometimes confusing) point to keep in mind, is the difference between diffraction and refraction.

Longer wavelengths –near the red zone -- are diffracted more, but they refract less. The opposite is true for shorter wavelengths.

~~D~~

Me too!

dont worry your forum is in safe hands!

I got question 3 and 4 aha, only 12 more to go. Only 4 is below. 

Did you determine the final charge on each sphere in each case? How much charge must be transferred to achieve this final value?     (a) Rank the pairs according to the magnitude of the charge transferred during touching, greatest first.   3 > 1 > 2   1 = 2 = 3   2 > 1 > 3     SHOW HINT SHOW ANSWER

Did you determine the final charge on each sphere in each case?     (b) Rank the pairs according to the charge left on the positively charged sphere, greatest first.   3 > 1 > 2   2 > 1 > 3   1 = 2 = 3

I'll try and be around a bit Rosala.  I just canot be around as much as usual.

I am glad you are here to watch over the forum for me