Answer:
18
Step-by-step explanation:
since you want the difference in scores, you want to take the absolute value of the difference
9 - (-9) = 9+9 = 18
-2/3
-0.666
For this case we must determine the inverse of the following function:
Step 1:
We would write
or
Step 2:
We clear x:
Step 3:
"x" and "y" are exchanged:
The inverse is: