## anonymous 5 years ago The number of tickets sold each day for an upcoming performance of Handel's Messial is given by N(x)=-0.5x^2+13+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?

1. anonymous

wow this makes number 12 at least

2. anonymous

max at $-\frac{b}{2a}=-\frac{13}{2\times (-.5)}=13$

3. anonymous

day thirteen is the most, and you sell whatever you get when you replace x by 13

4. saifoo.khan

lol, she wrote -0.5x^2 + 13 + 12.

5. anonymous

i am assuming it was $N(x)=-0.5x^2+13x+12$

6. saifoo.khan

Forget the "x".

7. anonymous

So what will be the number of tickets sold on the 13th day?

8. saifoo.khan

insert x = 13 96.5 which means 97