Question

The midpoint of AB is M(0, –4). If the coordinates of A are (-8, -7), what are the coordinates of B?
Please answer ASAP :( 10 points

Answer 1

Answer:

            B(8, -1)

Step-by-step explanation:

M(0, -4) being the midpoint of AB means that  $x_M-x_A=x_B-x_M$

$0-(-8)=x_B-0\\\\x_B=8$

and   $y_M-y_A=y_B-y_M$

$-4-(-7)=y_B-(-4)\\\\-4+7=y_B+4\\\\y_B=3-4\\\\y_B=-1$