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pre cal

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Q1: Find the length and midpoint of segment PQ given P(3,2) and Q(-1,4)

Q2: The midpoint of AB is M(1/2 , 6). Given A(3,7), find the coordinates of B.

  • pre cal - ,

    for the points (a,b) and (c,d) the midpoint is ((a+c)/2, (b+d)/2)
    so midpoint of PQ = ((3-1)/2,(2+4)/2) = (1,3)

    for #2
    let B be (a,b)
    then isn't (a+3)/2 = 1/2
    and (b+7)/2 = 6 ?

    solve for a and b

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