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The three coordinate points are collinear. Use slopes to write aproportion to find the value of a.

#38. (-4,1),(-1,2),(5,a)

#39. (4,5),(1,2),(a,0)

  • Geometry -


    (a-2)/(5+1) = (2-1)/(-1+4)
    (a-2)/6 = 1/3
    3a - 6 = 6
    a = 4

    Do #39 the same way, let me know what you got

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