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INTEGERS

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Starting at home a salesman drove 20km east, then 9km north, then 4km east. finally, he drove x km south and at that point he was exactly 25 km away from his home. find x.

  • INTEGERS - ,

    d = 24km@0o+9km@90o+4km@0o+Nkm@270o.

    Find N.
    X = 20+4 = 24 km.
    Y = (8-N)km

    d^2 = X^2 + Y^2 = 35^2.
    d^2 = (130^2+(8-N)^2 = 35^2
    576+(N^2-16N+64) = 1225
    N^2-16N+640-1225 = 0
    N^2-16N-585 = 0
    N = 33.475(Use Quad. Formula)

  • INT EGERS - ,

    Oops! Name is Henry. Not anonymous.

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