anonymous
  • anonymous
Math check.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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pogo
  • pogo
@checker
Error1603
  • Error1603
?
mathmale
  • mathmale
If you want responses, please post the math problem you've been working on, and (very important) share your work with the rest of us.

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UnkleRhaukus
  • UnkleRhaukus
\[+-\times\div\quad \checkmark \]
anonymous
  • anonymous
My computer shut down. I'll have it right up
anonymous
  • anonymous
Which of the following shows the correct steps to find the value of |dw:1450192225162:dw|
UnkleRhaukus
  • UnkleRhaukus
is that \(\large27^{2/3}?\)
anonymous
  • anonymous
27 1 over 3
UnkleRhaukus
  • UnkleRhaukus
can you express 27 as \(\text{some number}^3\) ?
UnkleRhaukus
  • UnkleRhaukus
then you could cancel the indices
mathmale
  • mathmale
Sorry, but that's still vague. Which of the two expressions below is the one you mean?\[27^{2/3}, 27(2/3)?\]
UnkleRhaukus
  • UnkleRhaukus
\[\large 27^{1/3}\]
anonymous
  • anonymous
I believe it's.|dw:1450192365106:dw|
mathmale
  • mathmale
I see we're dealing with a "third root" here. That suggests we should explore the corresponding "third power." As Uncle has suggested, try re-writing 27 as a power of some base. Which base?
UnkleRhaukus
  • UnkleRhaukus
\[(\text{some number}^3)^{1/3}\\ =\text{some number}^{3/3}\\ =\text{some number}^{1}\\ =\text{some number}\]
mathmale
  • mathmale
So Unkle is using the exponent 2/3 to eliminate the power 3. This is exactly what you want to do.
UnkleRhaukus
  • UnkleRhaukus
(there shouldn't be any 9's)
anonymous
  • anonymous
I can only do it the way there shown. I can't change anything.
UnkleRhaukus
  • UnkleRhaukus
|dw:1450192628101:dw|
anonymous
  • anonymous
Okay. That's what I thought it was, but someone said it should be nine. That's why I asked for the math check
UnkleRhaukus
  • UnkleRhaukus
3^3 = 3 x 3 x 3 = 9 x 3 = 27
anonymous
  • anonymous
Thank you for all your help!!!!!
mathmale
  • mathmale
Well, it's helped that you've shared your work. That's usually the only way in which you can get meaningful feedback. Be careful about relying too much on what "someone" told you, or at least evaluate that person's credentials before y ou accept as fact what he or she has said. You're welcome. Glad you've got this problem solved.

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