Treat it as (x^2/y^3)/(x^7/y^6)
which you can separate into (x^2/x^7) and (y^3/y^6)
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OpenStudy (anonymous):
answer is D?
OpenStudy (anonymous):
i dont know :/
OpenStudy (anonymous):
when you divide exponents, you subtract the exponent of the denom. from the exponent of the top.
so it would be x^(2-7)y^(3-6)
OpenStudy (anonymous):
so would that be 1/(x^5y^3)
OpenStudy (anonymous):
Correct
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OpenStudy (anonymous):
Not answer B?
OpenStudy (anonymous):
answer a^
OpenStudy (anonymous):
answer b implies (y^6/y^3) instead of its reciprocal
OpenStudy (anonymous):
i figure this one out already can you? ;)
OpenStudy (anonymous):
Cancel the 1s lol
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OpenStudy (anonymous):
i got the answer lol. do you know it?
OpenStudy (anonymous):
C?
OpenStudy (anonymous):
thats what i got! but idk forsure.. @slottedpig is c right?
OpenStudy (anonymous):
Hes gone...:(
OpenStudy (anonymous):
whaaaaaat :( how do you know??
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OpenStudy (anonymous):
Hes just helping someone else lol, he will will be back man!
OpenStudy (anonymous):
ahhhh okay
OpenStudy (anonymous):
YUP!
OpenStudy (anonymous):
im going to post it again so he wont have to scroll up! lol
OpenStudy (anonymous):
No, the answer is b.
The least common denominator of the top and bottom halves is xy
Multiply both top and bottom halves by xy: you get
\[((xy/x) - (xy/y))/((xy/x)/(xy/y))\]Since x/x = 1 and y/y = 1 you can cancel out several of these:
\[(y-x)/(y+x) \]which is answer choice B (2).
I understand how you got your answer (you probably subtracted the denominators of the top portion) but 1/2 - 1/3 is not -1.
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OpenStudy (anonymous):
In my first equation I accidentally have an extra division sign:
((xy/x)/(xy/y))
This is a mistake, the division sign in the middle is supposed to be a subtraction sign
OpenStudy (anonymous):
WOW...@slottedpig
OpenStudy (anonymous):
i was about to ask what that was haha! alright we got it covered now!
OpenStudy (anonymous):
"This is a mistake, the division sign in the middle is supposed to be a subtraction sign"
I meant it's supposed to be an addition sign.. sorry
OpenStudy (anonymous):
anyone wanna help me with 20 questions? just give me answers? ill pay you via paypal. im so tired :(
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