Answers

  • Brainly User
2015-09-08T00:28:08+08:00
Midpoint (M) = (x1 + x2  ,  y1 + y2)
                            2               2

Points A and B:
A (7,0)
B (x,y)

M (0 , 9) = ( 0=7 + x,   9=0 + y)
                         2              2
Solve for the x-coordinate of Point B:
0 = 7 + x     
       2
-7/2 = x/2
2(-7/2) = x
x = -7

Solve for the y-coordinate of Point B:
9 = 0 + y
         2
18 - 0  = y/2
    2

9 = y/2
2(9) = y
 y = 18

Point B coordinates (-7, 18)  Final answer




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