X+12= -15 ASAP! ASAP! ASAP!

Mathematics

1 answer:

mixer [17]3 years ago

7 0

Answer:

x = -27

Step-by-step explanation:

Let's solve your equation step-by-step:

x + 12 = -15

Subtract 12 from both sides of the equation:

x + 12 - 12 = -15 - 12

x = -27

So therefore, that is how you found your answer: x = -27

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When a water-cooled nuclear power plant is in operation, oxygen in the water is transmuted to nitrogen-17. After the reactor is

wolverine [178]

Answer:

The differential equation is $\frac{dR}{dt} = -kR$

Step-by-step explanation:

Differential equation for the rate of change in radiation level:

Radiation level is R.

Rate of change indicates that the radiation level R varies in function of time t, which mathematically means that we have:

$\frac{dR}{dt}$

After the reactor is shut down, the radiation from the nitrogen-17 decreases in such a way that the rate of change in the radiation level is directly proportional to the radiation level.

Rate of change is k. Decreases means that k is negative. Proportional to the radiation level of R means that -k multiplies R. So the differential equation is:

$\frac{dR}{dt} = -kR$

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3 years ago

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Answer:

13.1 (3sf)

Step-by-step explanation:

14 ^2 - 5^2 = 171

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3 years ago