Question

if a line segment has endpoints A(3x+5, 3y) and B(x-1,-y), what are the coordinates of the midpoint of ab

Answer 1

just add the x values and divide by 2, then add the y values and divide by 2

3x+5+x-1 = 4x+4. divide by 2 you get 2x+2
3y+-y=2y, divided by 2 gives y

midpoint is (2x+2, y)