anonymous
  • anonymous
given y varies directly as x, and y=9 when x=3. Find y when x=11
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
it would be 17
anonymous
  • anonymous
y = ax 9 = a3 so a = 3 y = 3x y = (3)(11)
anonymous
  • anonymous
So, y would equal 33.

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anonymous
  • anonymous
no.... it wouldn't
anonymous
  • anonymous
Good luck to you in all of your studies and thx for the recognition! @lvasquev462
anonymous
  • anonymous
O.o
anonymous
  • anonymous
i have one more of these questions
anonymous
  • anonymous
sure :P
anonymous
  • anonymous
go right ahead, np.
anonymous
  • anonymous
given y varies directly as x and y=4 when x=20. Find x when y=6
anonymous
  • anonymous
y = ax 4 = a(20) a = (1/5) y = (1/5)x x = 5y x = (5)(6) = 30
anonymous
  • anonymous
y=ax y=(20)(6)
anonymous
  • anonymous
it'S 20 AND 6! URG
anonymous
  • anonymous
So, all I did was basically the same thing, but the only twist here is that I flipped the "x" and "y". See that?
anonymous
  • anonymous
yeah i seen tht
anonymous
  • anonymous
So, with these "varying directly" problems, you can start out the same way in both cases. Nice working with you!

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