Answer:
10
Step-by-step explanation:
Answer:
B
Step-by-step explanation:
this is the answer to this question
Answer: 181
Step-by-step explanation: hi
F(x) = 5x
for f(7) you replace x with 7 so it will be : f(7) = 5(7) = 35
The first pipe fills 1/8 of a pool in one hr.
The second pipe fills 1/4 of a pool in one hr.
(1/8+1/4)2= 3/4 done by the first two pipes in 2 hours.
Therefore the last pipe must do 1 1/4 of the filling in 2 hours, which is 5/8 per hour.
5/8x=1
x=8/5
It takes the third pipe 1 hour and 36 minutes to fill it by itself.
