Answer:
D
Step-by-step explanation:
(3, 9) (-3, 5)
0 is in the middle 7 is in the middle
for x: 3 2 1 0 -1 -2 -3 for y: 9 8 7 6 5
Thus, (0, 7) is the midpoint between (3, 9) and (-3, 5)
y=-3
5x+7y=-31
(-) 5x-9y+17
-----------------
16y=-48
------------
16 16
The solution is attached as a word file.
28
18+6+4=28
