3 years ago

9x-5x-3+10=(9x-5x)+(-3+10)

Mathematics

1 answer:

IrinaK [193]3 years ago

6 0

Answer:

4x + 7

Step-by-step explanation:

9x - 5x = 4x

-3 + 10 = 7

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Answer:

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A solution of concentration 0.03 kg of salt per liter enters a tank at the rate 9 L/min.

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The solution is mixed and drains from the tank at the same rate.

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$=\dfrac{y(t)}{1000}* 9\dfrac{liter}{min}=0.009y(t)\dfrac{kg}{min}$

Therefore, the differential equation for the amount of Salt in the Tank at any time t:

$\dfrac{dy}{dt}=R_{in}-R_{out}\\\\\dfrac{dy}{dt}=0.27-0.009y(t),$ y(0)=60kg$

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