## Geometry: Common Core (15th Edition)

$K(-6,-7)$
use the midpoint formula $M_x=\frac{x_1+x_2}{2}$ substitute $-3=\frac{0+x_2}{2}$ multiply both sides by 2 $-3\times2=\frac{0+x_2}{2}\times2$ $-6=x_2$ $M_y=\frac{y_1+y_2}{2}$ substitute $2=\frac{11+y_2}{2}$ multiply both sides by 2 $2\times2=\frac{11+y_2}{2}\times2$ $4=11+y_2$ subtract 11 from each side $4-11=11+y_2-11$ simplify $-7=y_2$