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The number of tickets sold each day for an upcoming performance of Hanel's messiah is given by N(x)=-0.6x^2+12x+10, 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?

• math -

N(x) = -.6[ x^2 - 20x + ....... ] + 10
= -.6[x^2 - 20x + 100 - 100 ] + 10
= -.6[(x-10)^2 - 100 ] + 10
= -.6(x-10)^2 + 60 + 10
= -.6(x-10)^2 + 70

carry on with the answer ....

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