Answer:
B
Step-by-step explanation:
We are given that <em>x</em> and <em>y</em> are functions of time <em>t</em> such that <em>x</em> and <em>y</em> is a constant. So, we can write the following equation:

The rate of change of <em>x</em> and the rate of change of <em>y</em> with respect to time <em>t</em> is simply dx/dt and dy/dt, respectively. So, we will differentiate both sides with respect to <em>t: </em>
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Remember that the derivative of a constant is always 0. Therefore:

And by subtracting dy/dt from both sides, we acquire:

Hence, our answer is B.
Answer:
Step-by-step explanation:
2,400,000 is my answer (: I calculated it
Answer:
The population is growing by about 1.34% each year1. We ... Looking at these two equations that represent the balance in two different ... We now solve these as a system of equations.
First divide the 2nd equation by -3
3x+3y=10
same as other
they are the same line
so the solution is where they intersect
they are the same line
the intersection points are the points on the line
the solution is 3x+3y=10, that's all the points that satisfy the system