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GREYUIT [131]
3 years ago
8

ITS DUE TMRW!! PLS HELP

Mathematics
1 answer:
Nonamiya [84]3 years ago
3 0

Answer:27

Step-by-step explanation:

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A pool has 2 pipes, one to fill and one to empty it. Ms.Charles wants to fill the pool, but she mistakenly turns on both pipes a
dolphi86 [110]

-- The filler pipe can fill 1/6 of the pool every hour.

-- The drainer pipe can drain 1/10 of the pool every hour.

-- When they're filling and draining at the same time, the filler pipe
will win eventually, because it finishes more of the pool in an hour
than what the drain pipe can finish in an hour.

-- When they're filling and draining at the same time, then every hour,
1/6 of the pool fills and 1/10 of it empties.  The difference is   (1/6) - (1/10).

To do that subtraction, we need a common denominator.
The smallest denominator that works is 30.

       1/6  =  5/30

     1/10  =  3/30 .

So in every hour,  5/30 of the pool fills, and  3/30 of the pool empties.
The result of both at the same time is that  2/30 = 1/15  fills each hour.

If nobody notices what's going on and closes the drain pipe, it will take
<em><u>15 hours</u></em> to fill the pool.


If the drain pipe had <em><u>not</u></em> been open, the filler pipe alone could have filled
the pool <em><u>2-1/2 times</u></em> in that same 15 hours.  With both pipes open,
1-1/2 pool's worth of water went straight down the drain during that time,
and it was wasted. 

I would say that the school should take the cost of 1-1/2 poolsworth out
of Ms. Charles' pay at the rate of $5 a week.  I would, but that would
guarantee her more job security than she deserves after pulling a stunt
like that.

I hope this did not take place in California.


6 0
3 years ago
Solve for the MNQ angle, please add steps and how to get the answer please and thank you
dusya [7]

Answer:

x =  15

Step-by-step explanation:

3x - 13 + 58 = 90

3x - 13 = 90 - 58

3x -13 = 32

3x = 32 + 13

x = 45/3

x = 15

6 0
3 years ago
If the area of a rectangle is represented by x^2+ 27x- 124, then which expression
Reika [66]

Answer:

B x+31

Step-by-step explanation:

3 0
3 years ago
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How many hours is this flight: Departure Dallas, TX 8:30 am Arrival Chicago, IL 10:30 am
GenaCL600 [577]

Answer:

2\ hours

Step-by-step explanation:

To know the hours of flight, subtract the departure time from the arrival time

so

(10:30 am-8:30 am)=2\ hours

Remember that Chicago and Dallas are in the same time zone


8 0
3 years ago
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A freight train completes its journey of 150 miles 1 hour earlier if its original speed is increased by 5 miles/hour. What is th
e-lub [12.9K]
25 mph the train is accelerating at a constant rate<span />
4 0
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