M is the midpoint of JK. find the coordinates of K.

Question

1. J (-8,4) M (-1,1)
2. J (9,-5) M (5, -2)
3. J (0,11) M (-3,2)

Answer 1

I'll do #2, you do the others

2.
let the endpoint be K(x,y)
(x+9)/2 = 5
x+9 = 10
x = 1

(y - 5)/2 = -2
y-5 = -4
y = 1
K is (1,1)

check:
midpoint of JK = ( (9+1)/2 , (-5+1)/2)
= (5,-2) as given

Answer 2

I hate this problem cuz instead of finding the midpoint, your finding an endpoint instead, and I don't know if midpoint formula applies if you're finding an endpoint instead.

Answer 3

6,-2

Answer 4

What are the coordinates of K if P is the midpoint of JK