anonymous
  • anonymous
Evaluate each expression. (2*3^-2)/(2^-2*3^-1)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
i got an answer of -3/2
anonymous
  • anonymous
Let's see your working. Using Draw if possible please :D
anonymous
  • anonymous
Or in text if you prefer

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More answers

anonymous
  • anonymous
|dw:1327954706090:dw|
anonymous
  • anonymous
the top part gave me -18 and the bottom gave me 12. so it looked like -18/12, which gave me -3/2
anonymous
  • anonymous
What does a negative exponent mean?
anonymous
  • anonymous
does 3^-2 mean, -3*-3 or 3*-3?
anonymous
  • anonymous
Neither.
anonymous
  • anonymous
ah!
anonymous
  • anonymous
A negative exponent works like this:|dw:1327954914818:dw|
anonymous
  • anonymous
i thought i was only supposed to do that when there was a x or something. i thought for regular numbers i was just supposed to keep going
anonymous
  • anonymous
Nope, it should work equally well for regular numbers,
anonymous
  • anonymous
ok, so i got an answer of 1/27 this time
anonymous
  • anonymous
want me to show you how?
anonymous
  • anonymous
Here's why it works for regular numbers:|dw:1327955027052:dw|
anonymous
  • anonymous
(2/1)(1/3^2)=2/9. (1/2^2)(1/3)=1/12
anonymous
  • anonymous
then (2/9)(1/12)=4/108=1/27
anonymous
  • anonymous
But it's 2/9 DIVIDED BY 1/12, not multiplied :D
anonymous
  • anonymous
oh crap
anonymous
  • anonymous
If you go to the top, it was a fraction as you wrote it out for me, remember :D
anonymous
  • anonymous
Chill, easy mistake to make :D
anonymous
  • anonymous
So what's the right answer then :) ?
anonymous
  • anonymous
8/3?
anonymous
  • anonymous
That's right!
anonymous
  • anonymous
i flipped it so it became (2/9)(12/1)
anonymous
  • anonymous
cool thanks
anonymous
  • anonymous
No problem :D
anonymous
  • anonymous
Yep , that's how I'd do it too!

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