SOLUTION: Please help with this story problem. The number of tickets sold each day for a concert is N(x)=-0.3x^2+6x+10 where x is the number of days since the concert has been announced. W

Question 176979: Please help with this story problem.
The number of tickets sold each day for a concert is N(x)=-0.3x^2+6x+10 where x is the number of days since the concert has been announced. When will sales peak and how many tickets will be sold that day?
Thank you
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
The number of tickets sold each day for a concert is N(x)=-0.3x^2+6x+10 where x is the number of days since the concert has been announced. When will sales peak and how many tickets will be sold that day?
:
N(x)=-0.3x^2+6x+10 is a quadratic equation so the max will occur at the axis of symmetry
The formula for that: x =
In this equation, a=-.3, b=6
x =
x =
x = +10 days when max tickets will be sold
;
"how many tickets will be sold that day?"
substitute 10 for x in the original equation:
N(x)=-0.3x^2+6x+10
N(x)=-0.3(10^2) + 6(10) + 10
N(x)=-30 + 60 + 10
N(x)= 40 tickets sold on day 10 which is the max
:
:
did this make sense to you?
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