Answer: 
Step-by-step explanation:
Here the give expression is,

We can write,
( because
)

⇒ Option D is correct.
I think it would be $14 per book
Answer:
The mid-point is (9,-9/2)
Step-by-step explanation:
You would use the mid-point formula for this

if you plug that in it is (
)
resulting in (11/2,-2/2) = (11/2,-1)
Mean Absolute Deviation I'm pretty sure. Hope this helped, have a great day! :D
Answer:
3
Step-by-step explanation: