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lyssa

  • 2 years ago

y varies inversely as twice x. When x = 2, y = 5. Find y when x = 10

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  1. myininaya
    • 2 years ago
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    inversely think division directly think multiplication Your problem says inversely So you want to do division y=k/what?

  2. myininaya
    • 2 years ago
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    k is a constant by the way

  3. myininaya
    • 2 years ago
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    what goes in the denominator?

  4. lyssa
    • 2 years ago
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    I forgot the formula though

  5. myininaya
    • 2 years ago
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    what does twice x mean?

  6. lyssa
    • 2 years ago
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    two times X

  7. myininaya
    • 2 years ago
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    right so that part is the answer to my question

  8. myininaya
    • 2 years ago
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    \[y=\frac{k}{2x}\]

  9. lyssa
    • 2 years ago
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    What is K though?

  10. myininaya
    • 2 years ago
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    Now plug in 2 for x and 5 for y and solve for k This number k is a constant so what you get is what k will always be no matter what x and y are

  11. lyssa
    • 2 years ago
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    OH!! Ok thanks:D

  12. myininaya
    • 2 years ago
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    Feel free to let me know what you get for k And I will give you a thumbs up or a thumbs down k?

  13. lyssa
    • 2 years ago
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    K=20

  14. myininaya
    • 2 years ago
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    Brilliant! *puts thumbs up*

  15. lyssa
    • 2 years ago
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    How do I solve the other part where it say find Y when X=10 though

  16. myininaya
    • 2 years ago
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    So we have \[y=\frac{20}{2x}\] Plug in x for 10 Simplify and evaluate to get y

  17. myininaya
    • 2 years ago
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    And you are done after that Congrats

  18. lyssa
    • 2 years ago
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    Y= 1

  19. myininaya
    • 2 years ago
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    yep

  20. lyssa
    • 2 years ago
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    YAY:D Thank you sooo much

  21. myininaya
    • 2 years ago
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    np

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