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lvasquev462

  • 2 years ago

given y varies directly as x, and y=9 when x=3. Find y when x=11

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  1. brookester6
    • 2 years ago
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    it would be 17

  2. tcarroll010
    • 2 years ago
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    y = ax 9 = a3 so a = 3 y = 3x y = (3)(11)

  3. tcarroll010
    • 2 years ago
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    So, y would equal 33.

  4. brookester6
    • 2 years ago
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    no.... it wouldn't

  5. tcarroll010
    • 2 years ago
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    Good luck to you in all of your studies and thx for the recognition! @lvasquev462

  6. brookester6
    • 2 years ago
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    O.o

  7. lvasquev462
    • 2 years ago
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    i have one more of these questions

  8. brookester6
    • 2 years ago
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    sure :P

  9. tcarroll010
    • 2 years ago
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    go right ahead, np.

  10. lvasquev462
    • 2 years ago
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    given y varies directly as x and y=4 when x=20. Find x when y=6

  11. tcarroll010
    • 2 years ago
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    y = ax 4 = a(20) a = (1/5) y = (1/5)x x = 5y x = (5)(6) = 30

  12. brookester6
    • 2 years ago
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    y=ax y=(20)(6)

  13. brookester6
    • 2 years ago
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    it'S 20 AND 6! URG

  14. tcarroll010
    • 2 years ago
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    So, all I did was basically the same thing, but the only twist here is that I flipped the "x" and "y". See that?

  15. lvasquev462
    • 2 years ago
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    yeah i seen tht

  16. tcarroll010
    • 2 years ago
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    So, with these "varying directly" problems, you can start out the same way in both cases. Nice working with you!

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