SOLUTION: The number of tickets sold each day for an upcoming performance of Handel's Messiah is given by N(x)=-0.6x^2+18x+12, where x is the number of days since the concert was first annou

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: The number of tickets sold each day for an upcoming performance of Handel's Messiah is given by N(x)=-0.6x^2+18x+12, where x is the number of days since the concert was first annou      Log On


   

Question 430491: The number of tickets sold each day for an upcoming performance of Handel's Messiah is given by N(x)=-0.6x^2+18x+12, 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?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi

 N(x)=-0.6x^2+18x+12    |represents a parabola opening downward

 N(x)=-0.6[(x-15)^2 - 225)+12    |completing the square to find the vertex

 N(x)=-0.6(x-15)^2 +135 + 12

 N(x)=-0.6(x-15)^2 + 147   Sales will peak on the 15th day with 147 tickets sold