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dylanm

  • 2 years ago

Can someone explain to me how it is possible to determine an answer for this question? http://i.imgur.com/ahpPs.jpg The waterslide one, I've had a go at it but there simply does not seem to be enough information (equations etc) to get answers. Any ideas?

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  1. jasonxx
    • 2 years ago
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    are you talking about 16?

  2. dylanm
    • 2 years ago
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    The one underneath, Analysis Question 1.

  3. jasonxx
    • 2 years ago
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    use tan theta= h1/ 5

  4. jasonxx
    • 2 years ago
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    and \[h1= \sqrt {l^2-25}\]

  5. dylanm
    • 2 years ago
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    In order to use trig, you need an angle, but there is no angle listed in this question.

  6. jasonxx
    • 2 years ago
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    coordinate of A is (16,0)

  7. dylanm
    • 2 years ago
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    The answer section in the back of the book states it is (15,0)

  8. jasonxx
    • 2 years ago
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    hmm...wait a sec

  9. jasonxx
    • 2 years ago
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    how come this cubic equation has got two roots only??

  10. jasonxx
    • 2 years ago
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    let's say coordinate of A is (x1,0)...your cubic function will be (x-0)(x-8)(x-x1)

  11. jasonxx
    • 2 years ago
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    but at x=0 value of cubic function is h1

  12. jasonxx
    • 2 years ago
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    so the function is (x-h1)(x-5)(x-x1)

  13. jasonxx
    • 2 years ago
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    now i am realising ...this question is really a good one :)

  14. jasonxx
    • 2 years ago
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    @lgbasallote where are you...come here ..have some fun

  15. lgbasallote
    • 2 years ago
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    someone called?

  16. jasonxx
    • 2 years ago
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    yea me....check out the question and help to figure this out ...please

  17. lgbasallote
    • 2 years ago
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    sorry. i hate math...i have no idea

  18. jasonxx
    • 2 years ago
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    well i had been seeing that...you have solved mathematics for most of the time ...but it's fine....if you don't wanna get in to this

  19. lgbasallote
    • 2 years ago
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    i seriously do not have any idea. i'm just a primary school student.

  20. jasonxx
    • 2 years ago
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    cool...

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spraguer (Moderator)
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