Answer:
or 
Step-by-step explanation:
we know that
To calculate the total distance Barb walked, add the distance to her friend's house plus the distance to the library.
so

Remember that

substitute



Convert to mixed number

Answer:
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6s - 10 = 2 + 3s + s
6s - 10 = 2 + 4s
6s - 4s = 2 + 10
2s = 12
s = 6
Step-by-step explanation:
Check second one

- 1/2 means square root

So



Hence.
Domain is restricted
Option B is correct