The midpoint of AB¯¯¯¯¯¯¯¯ is (‒4,7) and point A is (1,8). What are the coordinates of the other endpoint, B?

Answer 1

B is (-9, 6)

A's coordinates have its x coordinate 5 larger than the midpoint's x coordinate. B should have 5 less than the midpoint's x coordinate -4-5 =-9. A has a y coordinate 1 larger than the midpoint's 7, so B should have 1 less than 7 or 6