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# MATHS Q HeLp PLZ!!!! watch

1. Just wondering how to simplify ratio:

10x0.6^n-1 : 15x0.4^n-1

To get:

3^n-2 : 2^n-2

(I'm not sure which way round they go either)

And can you explain in detail please, because I'm no good with indices thank you
2. (Original post by Yep)
Just wondering how to simplify ratio:

10x0.6^n-1 : 15x0.4^n-1

To get:

3^n-2 : 2^n-2

(I'm not sure which way round they go either)

And can you explain in detail please, because I'm no good with indices thank you
What are common factors of both?
3. (Original post by ExWunderkind)
What are common factors of both?
Erm 5?
4. (Original post by Yep)
Erm 5?
Wait sorry, I think I have mistaken the question.

Is it

or

5. (Original post by Yep)
Just wondering how to simplify ratio:

10x0.6^n-1 : 15x0.4^n-1

To get:

3^n-2 : 2^n-2

(I'm not sure which way round they go either)

And can you explain in detail please, because I'm no good with indices thank you

I've started you off, I'm sure you can finish! Use the property of ratios that you can multiply both sides by a number and the ratio will still be conserved. (*=times)
6. (Original post by Yep)
Erm 5?

(Original post by Jkn)

I've started you off, I'm sure you can finish! Use the property of ratios that you can multiply both sides by a number and the ratio will still be conserved. (*=times)

On a side note, why is latex not showing an algebraic x correctly anymore?
7. (Original post by ExWunderkind)
On a side note, why is latex not showing an algebraic x correctly anymore?
Eh? ??

If you mean the "times" symbol, I've never had to use it before

Edit: I think it's because you used a decimal point
8. (Original post by Jkn)
Eh? ??

If you mean the "times" symbol, I've never had to use it before

Edit: I think it's because you used a decimal point
No the times symbol shows up fine for me:

However x is showing up weird for me:

Edit: It showed up weird in my preview, yet worked when I posted. Maybe you're right it was the decimal! Thanks :P
9. (Original post by ExWunderkind)
No the times symbol shows up fine for me:

However x is showing up weird for me:

Edit: It showed up weird in my preview, yet worked when I posted. Maybe you're right it was the decimal! Thanks :P
No worries
10. (Original post by Jkn)

I've started you off, I'm sure you can finish! Use the property of ratios that you can multiply both sides by a number and the ratio will still be conserved. (*=times)
It's alright xD I got it in the end, thanks a bunch though
11. (Original post by ExWunderkind)
No the times symbol shows up fine for me:

However x is showing up weird for me:

Edit: It showed up weird in my preview, yet worked when I posted. Maybe you're right it was the decimal! Thanks :P
Sorry did it, thank you

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