SOLUTION: The number of tickets sold each day for an upcoming performance of handel's Messiah is givn by N(x)=-0.4x^2+10.4x+10 where x is the number of days since the concert was first annou

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: The number of tickets sold each day for an upcoming performance of handel's Messiah is givn by N(x)=-0.4x^2+10.4x+10 where x is the number of days since the concert was first annou      Log On


   

Question 366861: The number of tickets sold each day for an upcoming performance of handel's Messiah is givn by N(x)=-0.4x^2+10.4x+10 where x is the number of days since the concert was first announced. When will daily sales peak and how many tickets will be sold that day? Pleas show work Thank you
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+N%28x%29=-.4x%5E2%2B10.4x%2B10
The peak is at x+=+-b%2F%282a%29 when the
equation is in the form ax%5E2+%2B+bx+%2B+c
a+=+-.4
b+=+10.4
+-b%2F%282a%29+=+-10.4%2F-.8
x+=+13
Sales will peak 13 days after concert is announced
+N%28x%29=-.4x%5E2%2B10.4x%2B10
+N%2813%29=-.4%2A13%5E2%2B10.4%2A13+%2B+10
Solve for N%2813%29+