Question

Segment AB has endpoints A(3,6) and B(9,-2) and midpoint M. Find the coordinates of M and Find AB.

Answer 1

use midpoint formula:
\[(\frac{ x_1+x_2 }{ 2 }. \frac{ y_1+y_2 }{ 2 })\]

Answer 2

substitute your points and solve

Answer 3

Thank you @AlexandervonHumboldt2

Answer 4

for AB use distance formula:
\[\sqrt{(x_1-x_2)^2+(y_1-y_2)^2}\]