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January 31, 2015

January 31, 2015

Posted by **celeste** on Sunday, June 12, 2011 at 10:08pm.

2(10^-x/3)=20

logtiny4(x-5)=-1

- pre calc -
**Reiny**, Sunday, June 12, 2011 at 11:54pmyou probably meant:

2(10^-(x/3) )=20

10^(-x/3) = 10 = 10^1 , now you have the same bases, so

-x/3 = 1

x = -3

log_{4}(x-5) = -1

by definition:

x-5 = 4^-1

x-5 = 1/4 = .25

x = 5.25

x = 1029

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