algebra
posted by Terry .
The number of tickets sold each day for an upcoming performance of Handel's Messiah is given by N(x)=0.6x^2+12+13, where x is the number of days since the concert was first announced. When will daily ticket sales peak and how many tickets will be sold that day?

algebra 
Henry
N(x) = 0.6x^x+12x+13.
The above is the Eq of a parabola that
opens downwrd. Therefore, the max point
on the curve is the vertex:
Xv = b/2a = 12 / 1.2 = 10 = The # of days.
In the original Eq, substitute 10 for
X to get # of tickets sold:
N(x) = (0.6)10^2 + 12*10 + 13 = 73. =
The # of tickets sold.
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