anonymous
  • anonymous
-18x^2y^-1/2 over 6x^-1/5y....Simplify and express the answer with positive exponents. Evaluate numerical expressions.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
do you need help in learning how to do these?
anonymous
  • anonymous
yes i do
anonymous
  • anonymous
when you write the expression as a fraction, the letters with the negative powers ...if they are above the viculum they go below and the sign changes in their pwer

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anonymous
  • anonymous
Ok I understand that part
anonymous
  • anonymous
if they are below the vinculum you take them aboce and change the sign in their powers
anonymous
  • anonymous
If you end up with ...eg...y^2 x y^1/2...you add the powers
anonymous
  • anonymous
Ok, add them...Gotcha
anonymous
  • anonymous
I can lead you through this question if you wish
anonymous
  • anonymous
Yes if you could please
anonymous
  • anonymous
Write the whole thing as numerator over denominator
anonymous
  • anonymous
\[x^2/x^{-1/5}=x^2x^{1/5}=x^{11/5}\]
anonymous
  • anonymous
did it
anonymous
  • anonymous
-18/6= -3/1 = -3
anonymous
  • anonymous
6 can go into the numbers 18 and 6...cancel
anonymous
  • anonymous
cancel them out?
anonymous
  • anonymous
\[y ^{-1/2}/y = y ^{1/2}y =y ^{3/2}\]
anonymous
  • anonymous
you will get -3 on top and the 6 at the bottom cancels
anonymous
  • anonymous
alright ok
anonymous
  • anonymous
Notice x has a negative power underneath
anonymous
  • anonymous
oh opss.... \[y^{-1/2}/y= 1/y^{1/2}y= 1/y^{3/2}\]
anonymous
  • anonymous
so in the end it's\[-3x^{11/5}/y^{3/2}\]
anonymous
  • anonymous
i notice it
anonymous
  • anonymous
carry x^-1/5 on top...it becomes x^1/5 and it is multiplied by x^2
anonymous
  • anonymous
I am getting the hang of this, I think that I get it now
anonymous
  • anonymous
The y^-1/2 goes to the bottom
anonymous
  • anonymous
u'll manage now ?

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