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hal_stirrup Group Title

y=-2375x+18000 at what value of x would y be less than 1400.

  • one year ago
  • one year ago

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  1. mathslover Group Title
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    is that 14000 or r u sure about 1400.

    • one year ago
  2. WhiiteRussian Group Title
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    Set y as 1400 and solve for x 1400=-2375x+18000 2375x=16600 x=7 Since the slope is negative, x has to be greater than 7 (if you draw the graph you will see)

    • one year ago
  3. mathslover Group Title
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    When will be y = 1400 ? first of all , let y =1400 1400 = -2375x + 18000 1400 - 18000 = -2375 x x = -6.98 so at x = -6.98 (approx. => x = -7) y will be 1400

    • one year ago
  4. mathslover Group Title
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    at -6.97 y < 1400.

    • one year ago
  5. mathslover Group Title
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    May be I am wrong .. satellite73 may correct me

    • one year ago
  6. WhiiteRussian Group Title
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    You could also arbitrarily plug in points greater or less than 7 and less than 7 to check the solution

    • one year ago
  7. mathslover Group Title
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    I meant x = 6.98 there

    • one year ago
  8. WhiiteRussian Group Title
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    mathslover, the answer would round up anyways, even at 2 significant digits. anyways i already posted the solution

    • one year ago
  9. hal_stirrup Group Title
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    thanks .

    • one year ago
  10. hal_stirrup Group Title
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    my text book gives x=8

    • one year ago
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