SOLUTION: QUESTION: Find the midpoint of the segment with the given endpoints. Then find the distance between the points. Write your answer in simplest form. <p>a) (4,2), (6,10) <p>b) (-3,

Algebra ->  Expressions -> SOLUTION: QUESTION: Find the midpoint of the segment with the given endpoints. Then find the distance between the points. Write your answer in simplest form. <p>a) (4,2), (6,10) <p>b) (-3,      Log On


   



Question 446070: QUESTION: Find the midpoint of the segment with the given endpoints. Then find the distance between the points. Write your answer in simplest form.

a) (4,2), (6,10)

b) (-3,5), (4,9)

Answer by Leaf W.(135) About Me  (Show Source):

You can put this solution on YOUR website!
Given two points (x1,y1), (x2,y2),
Midpoint formula: (x,y) of midpoint = (%28x1%2Bx2%29%2F2, %28y1%2By2%29%2F2)
Distance formula: distance = sqrt%28%28x2-x1%29%5E2+%2B+%28y2-y1%29%5E2%29
***
1a. (midpoint)
(x,y) = (%28x1%2Bx2%29%2F2, %28y1%2By2%29%2F2)
(x,y) = (%284%2B6%29%2F2, %282%2B10%29%2F2)
(x,y) = (10%2F2, 12%2F2)
(x,y) = (5, 6)
Therefore, the midpoint between (4, 2) and (6, 10) is (5, 6).
***
1b. (distance)
sqrt%28%28x2-x1%29%5E2+%2B+%28y2-y1%29%5E2%29
sqrt%28%286-4%29%5E2+%2B+%2810-2%29%5E2%29
sqrt%28%282%29%5E2+%2B+%288%29%5E2%29
sqrt%284+%2B+64%29
sqrt%2868%29
Factor: sqrt%282%2A2%2A17%29
You can pull out one number for every pair within a square root’s factors. Since there are two 2s, you can pull out a two: 2%28sqrt%2817%29%29
Therefore, the distance between (4, 2) and (6, 10) is 2sqrt%2817%29
***
2a. (midpoint)
(x,y) = (%28x1%2Bx2%29%2F2, %28y1%2By2%29%2F2)
(x,y) = (%28-3%2B4%29%2F2, %285%2B9%29%2F2)
(x,y) = (1%2F2, 14%2F2)
(x,y) = (1%2F2, 7)
Therefore, the midpoint between (-3, 5) and (4, 9) is (1%2F2, 7).
***
2b. (distance)
sqrt%28%28x2-x1%29%5E2+%2B+%28y2-y1%29%5E2%29
sqrt%28%284-%28-3%29%29%5E2+%2B+%289-5%29%5E2%29
sqrt%28%284%2B3%29%5E2+%2B+%284%29%5E2%29
sqrt%28%287%29%5E2+%2B+16%29
sqrt%2849+%2B+16%29
sqrt%2865%29
Factor: sqrt%285%2A13%29
There are no pairs of numbers so you cannot simplify.
Therefore, the distance between (-3, 5) and (4, 9) is sqrt%2865%29.