Answer:
-7
Step-by-step explanation:
because 15-22= -7
he started at 0, gained 15 points but then lost 22, so after the two problems he'd have a score of -7.
28.9 I think is this, I hope this help
The next term in this sequence would be 18.
I think the answer is -20
Answer:
D. 
Step-by-step explanation:

Simply subtract the two functions from each other and simplify to get the result.