Answer: 1.875 or
Step-by-step explanation:
Answer:
Step-by-step explanation:
4 (x+7) = 6x+20
The +20 is necessary because the left is twenty less, so in order to make them equal we must add twenty to the right.
Continue and solve by isolating integrates on one side and numbers on the other.
X=4
Answer:
y=.5x+8
Step-by-step explanation:
Answer:
The pump should be added by 8PM
Step-by-step explanation:
An oil tanker can be emptied by the main pump in 4 hours.
An auxiliary pump can empty the tanker in 11 hours.
the main pump is started at 7 PM,and we have 10 PM - 7PM = 3 hours to empty the tank.
So we have to look for the combined rate of the both pumps .
Let's say the volume= x
Rate of first pump= x/4
Rate of second pump= x/11
The rate will be added together
Combined rate= x/11 + x/4
Combined rate= 15x/44
But they have three hours to complete their pump
15x/44 = 3
X=1.0227
The pump should be added by 8PM
