Question

PB has endpoints at -2 and 12. What is the coordinate of its midpoint?

Answer 1

`midpoint\ M_(PB)=(P+B)/(2)\\=======================\\P=-2;\ B=12\\\\M_(PB)=(-2+12)/(2)=(10)/(2)=5`

Answer 2

I assume this is a horizontal or vertical line.
12-(-2)=14
14/2=7
12-7=5

The midpoint coordinate is 5.