Question

The midpoint of is point P at (−16,6). If point A is at (−10,8), what are the coordinates of point B? (−42,20) (−22,4) (−13,7) (2,−5)

Answer 1

The correct answer is: B) (-22,4).

Answer 2

`\bf \left( \cfrac{x-10}{2}~,~\cfrac{y+8}{2} \right)=\stackrel{midpoint~P}{(-16,6)}\implies \begin{cases} \cfrac{x-10}{2}=-16\\\\ x-10=-32\\ \boxed{x=-22}\\ ----------\\ \cfrac{y+8}{2}=6\\\\ y+8=12\\ \boxed{y=4} \end{cases}`