What percent of team B’s mean absolute deviation is the difference in the means?
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Given, arc QR is congruent to arc LN and arc OP is congruent to arc VW.
And the expressions for each arc in the diagram also given as:
Arc QR = 2x - y, arc LN = 11 , arc OP= 10 and arc VW=5x+y.
Hence, we will get the system of equations as following:
Arc QR = Arc LN
2x - y = 11 ...(1)
Arc OP = Arc VW
5x + y = 10 ...(2)
Next step is to add the two equation to eliminate y so that we can solve the equations for x. Therefore,
2x+5x = 11 + 10
7x = 21
Divide each sides by 7.
So, x= 3
Now plug in x=3 in equation (2) to get the value of y.
5(3) + y = 10
15 + y =10
15 + y - 15 = 10 - 15 Subtracting 15 from each sides.
y = -5
So, x=3 and y =-5
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so.. notice, the derivative is a quadratic with a negative coefficient
on the leading term,
that means, is a parabola opening downwards, it only has one
extrema, a maximum point, at its vertex,
what's the derivative at the vertex? well, is a horizontal tangent line,
thus, slope is 0, so, if you set the derivative to 0, you'll get the
maximum point, or, the peak of the rate for the rumor,
so, what the dickens is "y" at that point?
well