Answer:
option #4 (-oo, +oo)
Step-by-step explanation:
_______
t= -3.7
1. 5( t+3)= -3.5
2. 5t+15= -3.5
3. 5t= -18.5
4. t= -3.7
X=7
<3
20 hours
The answer is x = 8
