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Naha, I survived!

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Naha, I survived!

Postby SG. » Jan 11th, '12, 17:58

Alright, I was doing my Maths GCSE repeat today, and I couldn't for the life of me get this question:

(8/27)^(-3/4) X 0.025^-2 = 81

Prove it equals 81.
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Re: Naha, I survived!

Postby NextEpisode » Jan 16th, '12, 21:45

Zabe wrote:Alright, I was doing my Maths GCSE repeat today, and I couldn't for the life of me get this question:

(8/27)^(-3/4) X 0.025^-2 = 81

Prove it equals 81.


Is the X a variable? Is the purpose to solve the equation (X) ? Or is it simply a multiplication-sign?

The solution for X, in this eq, is;

X = (3/200) * (3/2)^(3/4)

Which is ~2.

....This might help you in the right direction...
- 0.025^-2 is the same thing as 1 / (0.025^2)
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Re: Naha, I survived!

Postby SG. » Jan 16th, '12, 21:47

The purpose is to prove that that equation equals 81.

If I remember correctly, it was non-calculator.
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Re: Naha, I survived!

Postby NextEpisode » Jan 16th, '12, 22:06

Zabe wrote:The purpose is to prove that that equation equals 81.

If I remember correctly, it was non-calculator.


I see, but again, is the X a variable? or a multiplication-sign?
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Re: Naha, I survived!

Postby SG. » Jan 16th, '12, 22:07

NextEpisode wrote:
Zabe wrote:The purpose is to prove that that equation equals 81.

If I remember correctly, it was non-calculator.


I see, but again, is the X a variable? or a multiplication-sign?

Multiplication.
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Re: Naha, I survived!

Postby the real slim shady » Feb 7th, '12, 14:03

a few of my freinds were doing that paper as well, no-one got it though :whistle:
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Re: Naha, I survived!

Postby SG. » Feb 7th, '12, 17:44

the real slim shady wrote:a few of my freinds were doing that paper as well, no-one got it though :whistle:

I did pretty good for someone who didn't revise a thing.
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Re: Naha, I survived!

Postby the real slim shady » Feb 7th, '12, 18:01

Zabe wrote:
the real slim shady wrote:a few of my freinds were doing that paper as well, no-one got it though :whistle:

I did pretty good for someone who didn't revise a thing.

:y:

i think most of my freinds fucked up though, they all thought it was really bad... but none of them revised either :laughing:
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Re: Naha, I survived!

Postby SG. » Feb 7th, '12, 20:01

I'm doing Additional, so I kinda knew most of the stuff anyway.

Except this one.
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