Question

The midpoint of AB is M(-2,0). If the coordinates of A are (-1,8), what are the coordinates of B?​

Answer 1

Answer:

          B(-3, -8)

Step-by-step explanation:

$x_M-x_A=x_B - x_M\qquad\quad\ \wedge\qquad y_M-y_A=y_B - y_M\\\\ -2-(-1)=x_B-(-2)\qquad\wedge\qquad 0-8=y_B -0\\\\ {}\qquad x_B=-3\qquad\qquad\wedge \qquad\qquad \ y_B=-8$