Given that M( 1, -6) is the midpoint of {AB} and A(-2, 1) is one endpoint, what is the sum of the coordinates of point B?

Guest Apr 18, 2019

#1**+1 **

Given that M( 1, -6) is the midpoint of {AB} and A(-2, 1) is one endpoint, what is the sum of the coordinates of point B?

x coordinate = [ x - 2 ] / 2 = 1 multiply both sides by 2

x - 2 = 2 add 2 to both sides

x = 4

y coordinate = [ 1 + y ] / 2 = -6 multiply both sides by 2

1 +y = - 12 subtract 1 from both sides

y = -13

So B = ( 4, -13)

CPhill Apr 18, 2019