Answer:
n=-7
Step-by-step explanation:
For this you can do the inverse of division which is division. So Divide -91 and 13. Which is -7.
14 and 15 are not functions while 13 and 16 are functions
Answer:

Step-by-step explanation:
You add the exponents when the number/variable is the same, so:
6+8+n= 14+n
So:

He graded 60/75 papers.
If you divide these numbers instead of trying to simplify it equals the decimal 0.8.
If you move the decimal point two places to the right it's 80%.
Volume equals pi times r squared times height
So it would be 81pi in cubed