Given endpoint P(1, -4) and midpoint M(5, -7), what is the coordinate of ENDPOINT Q? If needed, round to the nearest tenth.
Your subject is Math, not Class
You should have a definition or method for finding the midpoint
Let the missing endpoint be (x,y)
for the x:
(x+1)/2 = 5
x+1 = 10
x = 9
for the y:
you do it.