Answer:
"Commutative property of addition and of multiplication"
Step-by-step explanation:
This is the "commutative property" of addition and of multiplication. That as its name indicates tells us for additions, that if we add A + B, or B + A, we should get the same result. Similarly, the "commutative property" of multiplication tells us that if we perform the product A * B we should get the same answer as if we perform the product: B * A.
-9-(-12)=-9+12=3
-9-12=-9+(-12)=-21
The answer would be -1/6 or -0.166667
On google, it says 8.463.
