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Kobotan [32]
3 years ago
12

A new type of pump can drain a certain pool in 6 hours. An older pump can drain the pool in 12 hours. How long will it take both

pumps working together to drain the pool?
Mathematics
1 answer:
Roman55 [17]3 years ago
8 0

Answer:

240 min

Step-by-step explanation:

if we convert it to minutes, one pool is drained in 360 min, while using another pump requires 720 min. the problem requires them working together, so we need to find the amount of pool drained in a unit pace, being one minute. using the first pump, in 1 minute 1/360 of the pool is drained, and 1/720 for the second pump. We can add them together, thus gaining 3/720 of the pool drained in 1 minute if they are applied together. then, you calculate 720/3 to find out how many minutes it takes for the whole pool to be drained, and you get 240

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Which algebraic expression can be used to represent HLAF of x increased by 5
SashulF [63]

Answer:

(x+5)/2

Explanation:

So First, x is increased by 5 means x+5

And half of it means, multiply it by (1/2)

Which means x+5 * 1/2 which also is equal to (x+5)/2

6 0
3 years ago
How do you solve something like this?
sdas [7]

Answer:

-24

Step-by-step explanation:

First, use the equation find the value of x. Then, substitutes the value of x into 9x+12.

8 0
2 years ago
Mr. Foster is starting a new job. His salary for the first year is $30,000. He will receive a 5% raise each year after that. Wri
stira [4]

Answer:

s= 30000+1500x

Step-by-step explanation:

Given data

Le the number of years be x

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=5/100*30000

= 0.05*30000

= $1500

Hence for x years the salary can be described as

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6 0
3 years ago
Joe will build a rectangular pen for his dog. A wall will form one side of the pen. Joe has 40 ft of fencing to form the other t
Svetlanka [38]
Material=wall+2*side and material is 40 ft so:

40=w+2s

w=40-2s

Area=ws, using w from above we get:

A=(40-2s)s

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dA/ds=40-4s and d2A/ds2=-4

Since d2A/ds2 is a constant negative acceleration, when dA/ds=0, A(s) is at an absolute maximum.

dA/ds=0 when 4s=40, s=10 ft

And since w=40-2s, w=20 ft

So the dimensions of the pen are 20 ft by 10 ft, with the 20 ft side being opposite the wall.  And the maximum possible area is thus 200 ft^2
6 0
3 years ago
Read 2 more answers
A) hat contains 4 red marbles and 3 blue marbles. Draw a tree diagram to illustrate the possible outcomes for selecting a marble
Charra [1.4K]

Answer:

there are 7 outcomes.

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Hope this helps!!! Brainliest?!

Step-by-step explanation:

7 0
3 years ago
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