Posted by **pam** on Saturday, March 15, 2014 at 10:56pm.

the number of tickets sold each day for an upcoming performance is given by

N(x)=-0.5x^2+13x+15 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?

Ticket sales peak ___ days after concert first announced.

The number of tickets sold on that day will be ______.

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