(8, 9) will be the midpoint of the segment.
You can find this by applying the formula
(x1 + x2)/2 , (y1 + y2)/2
1 stone = 20 square inches
1 stone * 30 = 20 square inches * 30
30 stones = 600 square inches
I dont know if this is right but here u goo
The answer is commutative property
Answer:

Step-by-step explanation: