<span>The sum of the measures of the internal angles in the quadrilateral is 360°.
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Therefore:
Answer: x = 66°.<span />
DB/dt = k*B
dB/(kB) = dt
Integrating both sides:
1/k*ln|B| = t + C
B = C*e^(kt)
At time t = 0, B = 4000 and at time t = 3 (3 hours past 9 AM), B = 4500
4000 = C
4500 = 4000*e^(3k) => k = 1/3*ln(9/8)
At time t = 15 (Midnight), B = 4000*e^(1/3*ln(9/8)*15) = 4000*(9/8)^5 = 7208 bacteria
Answer:
the answer is: y= -x²+6x+2
First we pick the equation. Let's say we pick first one. From it we express y.

Then we use this y and plug it in instead of y in the second equation.

Now just solve for x.

We plug this x in the first equation.

And solve for y.

So the solution to the equation is geometrically a point P which lies on the intersection of the two lines.

Hope this helps.
r3t40