Mathematics
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OpenStudy (jacobbirddog):
Please Help!!!!! Fan+medal!
If x varies inversely with y and x = 6 when y = 10, find y when x = 8.
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OpenStudy (anonymous):
how can i help you
OpenStudy (jacobbirddog):
well i need the answer in fraction formand i'm wondering how would i get it?
OpenStudy (anonymous):
luwigi
OpenStudy (anonymous):
sorry
OpenStudy (jacobbirddog):
ok?
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OpenStudy (anonymous):
what is the question
OpenStudy (jacobbirddog):
If x varies inversely with y and x = 6 when y = 10, find y when x = 8.
OpenStudy (anonymous):
it does not make sense to me sorry
ganeshie8 (ganeshie8):
Inverse relation :
\(\large y = \frac{k}{x} \)
ganeshie8 (ganeshie8):
plugin x = 6, y = 10 and find the value of \(\large k\) first
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OpenStudy (jacobbirddog):
ok
OpenStudy (jacobbirddog):
would it be 6/6? @ganeshie8
OpenStudy (jacobbirddog):
or 12/6?
ganeshie8 (ganeshie8):
plugin x = 6, y = 10 :
\(\large 10 = \frac{k}{6}\)
\(\large k = 60\)
OpenStudy (jacobbirddog):
could it be 4.8 or like 7.5?
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ganeshie8 (ganeshie8):
so,
\(\large y = \frac{60}{x}\) is your inverse function
ganeshie8 (ganeshie8):
read the quesiton,
u want to find y when x = 8, right ?
ganeshie8 (ganeshie8):
simply plugin x = 8 above^
ganeshie8 (ganeshie8):
\(\large y = \frac{60}{8} = \frac{15}{2} = 7.5\)
OpenStudy (jacobbirddog):
ok so i was right :D ty @ganeshie8 and thanks for telling me how to di it in detail
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ganeshie8 (ganeshie8):
yes :) u wlc !