anonymous
  • anonymous
I need help this is sooo hard 8th grade math!
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
it is hard, isn't it?
anonymous
  • anonymous
aalright haha im sure if you tae it in steps everything willl be simplar
anonymous
  • anonymous
What is the value of the expression \[ \frac{ 1 }{ 4^{-3}}\]

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anonymous
  • anonymous
alright easy lets start by looking at the problem
anonymous
  • anonymous
a.12 b.64 c. 1/64 d. 1/12
anonymous
  • anonymous
we have a 4^-3 in the denominator. what does that tell you?
anonymous
  • anonymous
Its either a or b
anonymous
  • anonymous
umm idk
anonymous
  • anonymous
lets not worry about the answer right now lets worry about the problem itself
anonymous
  • anonymous
alright i will let you know a nice rule. when you bring a number from the denominator to the numerator you slip the exponent
anonymous
  • anonymous
so something like 1/5^-2 = 5^2
anonymous
  • anonymous
do you understand?
anonymous
  • anonymous
no
anonymous
  • anonymous
ok thats fine. its just a rule. i just want to make sure you know 5^2 is 5 squared
anonymous
  • anonymous
do you understand that?
anonymous
  • anonymous
yes
anonymous
  • anonymous
alright cool
anonymous
  • anonymous
so with your problem we have 1/4^-3
anonymous
  • anonymous
we bring the 4^-3 to the numerator
anonymous
  • anonymous
and we get?....what?
anonymous
  • anonymous
umm
anonymous
  • anonymous
...
anonymous
  • anonymous
ok with our rule we change the sign of the exponent
anonymous
  • anonymous
so what is it?
anonymous
  • anonymous
4* -3 ???????
anonymous
  • anonymous
oh i see what you are confused about. when i am talking about sign i mean positive or negative
anonymous
  • anonymous
so all i mean by change the sign of the exponent is change it from -3 to 3
anonymous
  • anonymous
so you have just 4^3
anonymous
  • anonymous
now what is 4 to the power of 3?
anonymous
  • anonymous
Its 64!
anonymous
  • anonymous
tysm for helping me!
anonymous
  • anonymous
you are welcome please look over notes on this
anonymous
  • anonymous
its essential on later math problems you will have i highschool
anonymous
  • anonymous
SO happy!
anonymous
  • anonymous
im in the us
anonymous
  • anonymous
well i mean like algebra and pre calc it makes things easier if you know basic stuff like this

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