Answer:
If the pool is 2/3 filled and then the inlet pipe and drain pipe are opened, it will take 140 hours to fill the pool
Step-by-step explanation:
An inlet pipe can fill the pool in hours = 20
Inlet pipe 1 hour work = 
A drain pipe can empty the pool in 21 hours
Drain pipe 1 hour work =
Inlet pipe and drain pipe 1 hour together work = 
Now we are given that the pool is 2/3 filled
So, remaining portion to be filled =
So, Inlet pipe and drain pipe fill
in hours = 1
So, they can fill 1/3 in hours = 
Hence If the pool is 2/3 filled and then the inlet pipe and drain pipe are opened, it will take 140 hours to fill the pool
Answer:
B
Step-by-step explanation:
Exponents mean the base times itself
So 2^6 = 2 times itself six times
the answer is six.
take the 22 in the denominator to the other side of the = sign.
Answer:
-6x+11
Step-by-step explanation:
Answer:
Step-by-step explanation:
22a) width = 3x-1
2(3x-1)
6x-2 = length
22b) P = 2* length + 2* width
P= 2(6x-2) +2(3x-1)
P= 12x -4 +6x-2 ; 18x-6
22c) P = 18(5)-6
P = 84 cm