Answer:
21
Step-by-step explanation:

The Answer is x= -6 and x= -6
Answer:
B. Dan walked uphill, then downhill.
Step-by-step explanation:
The place that the slope went up is based on the distance from the starting point, so the distance is up then down. I hope this helped and please mark me as brainliest!
Good luck I really hope you past it then