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anonymous

  • 2 years ago

Help Me!!

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  1. anonymous
    • 2 years ago
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    Find the point that is one-fourth of the way from (1,7) to (18,22)

  2. anonymous
    • 2 years ago
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    @jim_thompson5910

  3. jim_thompson5910
    • 2 years ago
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    find the midpoint from (1,7) to (18,22) call this midpoint M

  4. anonymous
    • 2 years ago
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    sorry for bothering you again you really help

  5. jim_thompson5910
    • 2 years ago
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    once you have M, use this to find the midpoint from (1,7) to M

  6. jim_thompson5910
    • 2 years ago
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    this works because the quarter point is exactly half way between the starting point and the midpoint

  7. anonymous
    • 2 years ago
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    and what about the "one-fourth" in the sentence, what do we do with that?

  8. jim_thompson5910
    • 2 years ago
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    look at my next post after that

  9. anonymous
    • 2 years ago
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    @jim_thompson5910 okay, i got (9.5,14.5)

  10. jim_thompson5910
    • 2 years ago
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    so that's your point M

  11. anonymous
    • 2 years ago
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    yup

  12. jim_thompson5910
    • 2 years ago
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    now you must find the midpoint from the starting point (1,7) to M(9.5, 14.5)

  13. anonymous
    • 2 years ago
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    im lost, how would I do that?

  14. jim_thompson5910
    • 2 years ago
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    the same way you found the midpoint between the two original points (ignore M)

  15. anonymous
    • 2 years ago
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    Would it be

  16. anonymous
    • 2 years ago
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    i think i have an idea

  17. anonymous
    • 2 years ago
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    i cant write it in the equation button, but would it be 1+x^2

  18. anonymous
    • 2 years ago
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    ughh

  19. jim_thompson5910
    • 2 years ago
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    not sure how you're getting that

  20. jim_thompson5910
    • 2 years ago
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    just find the midpoint between (1,7) and (9.5, 14.5)

  21. jim_thompson5910
    • 2 years ago
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    so add up the coordinates, divide by 2

  22. anonymous
    • 2 years ago
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    i mean would one point be 19?

  23. jim_thompson5910
    • 2 years ago
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    how are you getting 19?

  24. jim_thompson5910
    • 2 years ago
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    find the midpoint between (1,7) and (9.5, 14.5)

  25. anonymous
    • 2 years ago
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    |dw:1379389868710:dw|

  26. anonymous
    • 2 years ago
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    its a mess but i tried

  27. jim_thompson5910
    • 2 years ago
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    (1+9.5)/2 = ???

  28. anonymous
    • 2 years ago
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    can you please set it up into the formula. this is new stuff for me and tommorow i have a test based on this

  29. jim_thompson5910
    • 2 years ago
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    what does (1+9.5)/2 evaluate to

  30. anonymous
    • 2 years ago
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    5.25

  31. jim_thompson5910
    • 2 years ago
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    so that's the x coordinate of the midpoint between (1,7) and (9.5, 14.5) ie...it's the x coordinate of the quarter point

  32. jim_thompson5910
    • 2 years ago
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    do the same for the y coordinates

  33. anonymous
    • 2 years ago
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    so for the y coordinates i would add 7+14.5 which will give me 21.5 and then divide it by 2 which will give me 21.5

  34. jim_thompson5910
    • 2 years ago
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    21.5/2 = ??

  35. jim_thompson5910
    • 2 years ago
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    you typed 21.5 twice

  36. anonymous
    • 2 years ago
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    oops my bad its 10.75

  37. jim_thompson5910
    • 2 years ago
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    yep, so the quarter point is (5.25, 10.75)

  38. anonymous
    • 2 years ago
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    okay so will i always divide by 2? how do i know what do divide to? and would i always be adding as well?

  39. jim_thompson5910
    • 2 years ago
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    we're just finding midpoints

  40. jim_thompson5910
    • 2 years ago
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    a quarter point is a midpoint between the start and the original midpoint

  41. jim_thompson5910
    • 2 years ago
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    |dw:1379390420596:dw|

  42. anonymous
    • 2 years ago
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    and what would we do if it was asking for the 1/2 of the way?

  43. jim_thompson5910
    • 2 years ago
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    Add in the midpoint |dw:1379390452778:dw|

  44. jim_thompson5910
    • 2 years ago
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    now add in the point which is 1/4 way from P to Q, call this point N point N is the midpoint between P and M |dw:1379390509988:dw|

  45. anonymous
    • 2 years ago
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    so would the final answer be 5.25 or 10.75

  46. jim_thompson5910
    • 2 years ago
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    in retrospect, i should have named the quarter point Q, oh well

  47. jim_thompson5910
    • 2 years ago
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    they are used together to report the answer

  48. jim_thompson5910
    • 2 years ago
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    since all points are of the form (x,y)

  49. anonymous
    • 2 years ago
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    so the final answer would be (5.25,10.75)

  50. jim_thompson5910
    • 2 years ago
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    yes

  51. anonymous
    • 2 years ago
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    even though its just asking for 1 point? how do i know which point is it x or y?

  52. jim_thompson5910
    • 2 years ago
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    each and every point on a 2D coordinate grid is always of the form (x,y)

  53. jim_thompson5910
    • 2 years ago
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    so you need both x and y to figure out where you are on this grid

  54. anonymous
    • 2 years ago
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    thanks so much!

  55. jim_thompson5910
    • 2 years ago
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    yw

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