http://media.education2020.com/evresources/648-09-01-00-00_files/i0150000.jpg

=http://media.education2020.com/evresources/648-09-01-00-00_files/i0150001.jpg

Question

http://media.education2020.com/evresources/648-09-01-00-00_files/i0150000.jpg

=http://media.education2020.com/evresources/648-09-01-00-00_files/i0150001.jpg

lastdaywork · Answer

We also have an Equation tool :)
$$9^{10n-12} = \frac{ 1 }{ 6,561 }$$

lastdaywork · Answer

Now can you write 6,561 in terms of 9^{something} ??

anonymous · Answer

so 6,561^9? :)

anonymous · Answer

|dw:1391954907548:dw|

lastdaywork · Answer

No, I want you to factorize 6,561

anonymous · Answer

ohhh okay and you just put them together. is ee what yu did there :)

anonymous · Answer

okay hold on

anonymous · Answer

okay you mean what=6561?

anonymous · Answer

i got 9^4

lastdaywork · Answer

Can you answer the question now ??

anonymous · Answer

i dont know how to do this at all... i was trying to see if someone could show me how to do this step by step

lastdaywork · Answer

Correct. So the question becomes
$$9^{10n-12} = 9^{-4}$$

Can you tell me why I used (-4) ??