A line segment is bisected by a line with the equation - 5 y + 2 x = 1 . If one end of the line segment is at (6 ,4 ), where is the other end?

1 Answer
Jul 14, 2017

The coordinates of the other end is =(210/29,28/29)

Explanation:

The equation of the line is

-5y+2x=1

5y=2x-1

y=2/5x-1/5.......................(1)

The slope of the line is m=2/5

The slope of the segment is m'

mm'=-1

m'=-5/2

The equation of the segment is

y-4=-5/2(x-6)

y=-5/2x+15+4

y=-5/2x+19.......................(2)

Solving for x and y in the equations (1) and (2) gives the point of intersection of the line and the segment

-5/2x+19=2/5x-1/5

2/5x+5/2x=19+1/5

29/10x=96/5

x=96/5*10/29=192/29

y=2/5*192/29-1/5=71/29

Let the other end of the segment be =(a,b)

Therefore,

(192/29,71/29)=((a+6)/2,(b+4)/2)

(a+6)/2=192/29

a=384/29-6=210/29

(b+4)/2=71/29

b=144/29-4=28/29