Algebra: Check please

1. Find the distance between the pair of points. Round to the nearest tenth is necessary. (-13, -8) and (6, 17)
a. 11.4
b. 12.1
c. 31.4
d. 23.7
is the answer c?

2. Find the distance between the pair of points. Round to the nearest tenth, if necessary. (-10, -8) and (-3, 12)
a. 13.6
b. 21.2
c. 23.4
d. 15.1
is the answer b?

3. The coordinates of the endpoints of a segment are given. Find the coordinates of the midpoint of the segment. G(-7, 7), H(-1, 7)
a. (4,-8)
b. (7,-4)
c. (-4,7)
d. (-3.5,7)
is the answer a?

4. The coordinates of the endpoint of a segment are given. Find the coordinates of the midpoint of the segment. A(4, 12), B(2, -2)
a. (8,0)
b. (3,5)
c. (4,7)
d. (6,10)
is the answer c?

Just check these: tell me what I got wrong and try and help me get the right answer. Please.

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  1. 1. and 2. are correct

    Both of your midpoints are wrong.

    To get the midpoint, ADD the x's and divide by 2, then add the y's and divide by 2

    so
    3. for the x's (-7 + (-1))/2 = -4
    for the y's (7+7)/2 = 7
    midpoint is (-4,7) which would be c)

    try 4. the same way and you should get (3,5)

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  2. Round to the nearest tenth if necessary.

    Find the distance between the two points.

    (1, –2), (10, –4)

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