Algebra please help

posted by Cheryl

1. Find the distance between the pair of points. Round to the nearest tenth is necessary. (-10, 4) and (6, 12)
a. 11.4
b. 17.9
c. 31.4
d. 23.7

2. Find the distance between the pair of points. Round to the nearest tenth, if necessary. (-8,10) and (-2,10)
a. 13.6
b. 21.2
c. 23.4
d. 6.0

Please just explain how to do this. Thank you!

  1. Damon

    (-10, 4) and (6, 12)
    distance is hypotenuse of right triangle

    d^2 = (X2-X1)^2 + (Y2-Y1)^2
    d^2 = (6-(-10)^2 + (12-4)^2
    d^2 = 16^2 + 8^2
    d^2 = 256 + 64
    d^2 = 320
    d = sqrt(320) = 17.89

  2. Anonymous

    (4,-5), (-3,-3)

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