Answer:
Step-by-step explanation:
9000-500h=0+500h
h= 9 hours
From what I am looking at, it seems as if it is. :)
Check the picture below.

since the distance AB cannot be a negative value, thus is not -3-√(130).
Answer:
1. They consist primarily of variables.
2. They are often called formulas.
4. They often describe real-world relationships.
<span>-34-r=-7(8r-3)
- 34 - r = - 56r + 21
- r + 56r = 21 + 34
55r = 55
r = 55/55
r = 1</span>