Question

The midpoint of AB is M(3,-1).If the coordinates of A are (8,4) what are the coordinates of B

Answer 1

Answer:

B(-2,-6)

Step-by-step explanation:

The midpoint of AB is M, then A(8,4), M(3,-1)

So we can find:

$x_{B} =2x_{M} -x_{A}= 2*3-8= -2\\y_{B}= 2y_{M} -y_{A} = 2*(-1)- 4= -6$

then B(-2,-6), hope that useful.