Answer:
18 hours
Step-by-step explanation:
The unit rate of intake pipe is
[1 tank in 6 hours]
The total unit rate (combined) when 2 work together is
[1 tank in 9 hours]
Intake fills up and outlet empties. Thus we can say:
Rate of Intake - Rate of Outlet = Combined Rate
This becomes:

Where x is the rate of outlet pipe [what we are looking for]
Doing algebra we solve for x:

This means "outlet pipe can empty 3 tanks in 54 hours". So that would mean 54/3 = 18 hours to empty 1 tank
Answer:
Step-by-step explanation:
OBTUSE......
Answer:
If your looking for the slope-intercept from of each one then its:
1)
or 
2) 0x + 5
3) 
4)
or 
5) x + 5 or 1x + 5
Hope this helped!
267.84 multiply $720 by 6.2% then device by 6