The number of tickets sold each day for an upcoming performance of Handels Messiah is given by N(x)=-0.3x^2+9x+13, where x is the number of days since the concert was first announces. When will daily ticket sales peak and how many will be sold that day? ( I am very lost here)

Question

The number of tickets sold each day for an upcoming performance of Handels Messiah is given by N(x)=-0.3x^2+9x+13, where x is the number of days since the concert was first announces.  When will daily ticket sales peak and how many will be sold that day?  ( I am very lost here)

asnaseer · Answer

do you know how to find the max/min of a function?

asnaseer · Answer

have you done calculus?

anonymous · Answer

i have never done calculus

anonymous · Answer

I am pretty much a math idiot

asnaseer · Answer

so maybe your teacher wants you to graph this function and then see what the maximum value is?

anonymous · Answer

you can complete the square to find the vertex of the equation

anonymous · Answer

they want to know what day the ticket sales will peak after the concert was first announced and the number of tickets sold on that day

asnaseer · Answer

yes - we know that - moneybird and myself are trying to establish which method would be best for you depending on what you have been taught

asnaseer · Answer

so, as moneybird stated, have you studied how to express a quadratic equation in vertex form?

asnaseer · Answer

We can't help you if you don't respond.

anonymous · Answer

sorry yes

anonymous · Answer

i was trying to make sense of this problem thats I wasnt responding.....ready to rip my hair out...:(

asnaseer · Answer

so try and re-arrange the equation in vertex form

asnaseer · Answer

which is:$$N(x)=a(x-h)^2+k$$

anonymous · Answer

ok