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thank you

Anything x<-2 or x>7

2666.6666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666667

We can simplify the radical to \(\frac{10^{31}}{10^{-3}}\), which equals 10^34

The square root of 10^34 is 10^17

10^17 * 10^3 = 10^20

So, n=20

You mean \(-3\sqrt6 - (-3\sqrt6)?\)

A double negative makes a positive. The answer to this question is \(-3\sqrt6 + 3\sqrt6\) , which equals 0

0

The answer to anything to the 1/2 power is the square root of the number. Therefore, (7n)^1/2 = \(\sqrt{7n}\)

ouch this is good i didnt answer this isnt it!

This is an AMC 10B problem. You probably shouldn't post it until everyone has taken the test (maybe next week?). By the way, I was also stuck on this problem.

10^n =10^3 x sqrt(10^34)

10^n =10^3 x 10^17 

10^n = 10^20    

n = 20

\(\boxed{\sqrt{7n}}\)

This is because \(a^\frac{1}{b}=\sqrt[b]{a}\)

So \(7n^\frac{1}{2}=\sqrt[2]{7n}=\sqrt{7n}\)

This was answered yesterday by Heureka:

web2.0calc.com

try this its called calculator!

Its a good one too

Thanks Melody!

You beat me to it StarStrike!

Good Work!

Conside the line from E to RC that is parallel to BC.     Let the point of intersection be X

EX=24

XR=24-6=18

find ER

\(ER=\sqrt{24^2+18^2}\\ ER=\sqrt{900}\\ ER=30 \)

Now PR is just the diagonal of one side of the square

\(PR=\sqrt{24^2+24^2}\\ PR=\sqrt{1152}\\ \)

Now I have all 3 sides of the triangle so I can use cosine rule to find the angle between them

the sides are      \(30, \quad30, \quad \sqrt{1152}\)

\(1152=900+900-2*900*Cos(PER)\\ 1152=1800-1800*Cos(PER)\\ -648=-1800*Cos(PER)\\ 0.36=Cos(PER)\\ \angle{PER}=cos^{-1}0.36=68.8998^\circ=68^\circ54' \)

That is assuming I've not made any stupid mistakes.

Pick any value of x <-2   or greater than 7   and you will get a positive result (greater than zero) for the equation.

After 2 hours:

RE^2 =18^2+24^2     (24 side length- 6 BE= 18)

RE=30

PR^2=24^2+24^2

PR=33.94112.....

Cos(PER)=30^2+30^2-33.9411...^2 / 2 (30) (30)

cos(PER) = 0.36

acos (0.36) = Angle PER

PER = 68.899803975907 degrees

HOPE THIS IS IT....... Please confirm

Very well presented StarStrike.  I am impressed !!!     

x^2-5x-14 simplified is

Using PSF

Product=-14

Sum= -5

Factors= -7, 2

Now using this:

(x-7)(x+2)

That is the simplified aka the solved form of this equation.

This is still confusing

Remember    F = ma      (this is the equation StarStrike used)

               F/a = m

             784.8/9.81 = 80 kg

Yah, I saw that and corrected my mis-interp before you told me that....sorry....

Check page 7 of this. If it is confusing, I will try to work you through the process.

http://missharvey.weebly.com/uploads/4/4/8/2/4482376/t3.pdf

This is how i do it once i have save the picture i want to a certian folder.

1 CLICK or Upload--->

NEXT Click Choose file *MAKE SURE TO CHOOSE ALL FILES*

After click the image you want to upload THEN PRESS IM NOT A ROBOT and click upload!

Then Click "OK" ! 

HOPE THIS MAKES SENSE!