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nalin [4]
2 years ago
13

N + 1 - 3N = 9 - N (IN A TEST)

Mathematics
2 answers:
rjkz [21]2 years ago
8 0

Answer:

N= -8

Step-by-step explanation:

a

My name is Ann [436]2 years ago
8 0
N=-8
hope this helps!!:)
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An oil tanker can be emptied by the main pump in 5 hours. An auxiliary pump can empty the tanker in 7 hours. If the main pump is
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Answer:

so the answer will be 1

Step-by-step explanation:

An oil tanker can be emptied by the main pump in 5 hours.

An auxilary pump can empty the tanker in 14 hours.

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so that the tanker is emptied by 11pm?

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Let t = no. of hrs to run the Aux pump

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The main pump will run 4 hr (7 - 11 pm)

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Let the completed job = 1; (an empty Tanker)

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The shared work equation

4%2F5 + t%2F14 = 1

Multiply equation by 70 to get rid of the equation, results:

14(4) + 5t = 70

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t = 14%2F5

t = 2.8 hrs to run the aux pump

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2.8 hr = 2 + .8(60) = 2 hrs 48 min

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Subtract 2:48 from 11:00 = 8:12 PM start the aux pump

;

;

Check solution

4/5 + 2.8/14 =

.8 + .2 = 1

6 0
3 years ago
The number 31 is increased to 44. What is the percentage by which the number was increased, to the nearest tenth of a percent?
Sophie [7]

Answer:

41.9 %

Step-by-step explanation:

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Read 2 more answers
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