Answer:
B = (7,3)
Explanation:
To find midpoint, we basically
Take the x coordinates of two points given and divide by 2 to find x coordinate of midpoint, and we take the y coordinates of two points given and divide by 2 to find y coordinate of point
Let coordinates of point B be (x,y) and A is given as (-1,8) and midpoint M is (3, 5.5), so:
we can say
(x - 1)/2 = 3
x - 1 = 6
x = 6 + 1
x = 7
And
we can say
(y+8)/2 = 5.5
y + 8 = 11
y = 11 - 8
y = 3
Hence, coordinate of point B are (7,3)