Answer
See below.
Work Step by Step
The distance formula from $P_1(x_1,y_1)$ to $P_2(x_2,y_2)$ is $d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$.
The midpoint $M$ of the line segment from $P_1(x_1,y_1)$ to $P_2(x_2,y_2)$ is: $(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})$.
Hence:
$d=\sqrt{(0-7)^2+(-3-(-8))^2}=\sqrt{49+25}=\sqrt{74}.$
$M=(\frac{7+0}{2},\frac{-8+(-3)}{2})=(\frac{7}{2},-\frac{11}{2})$.
