Homework Help: Algebra

Posted by Laura on Sunday, October 12, 2008 at 6:27pm.

I am supposed to find the ticket sales of a concert using this formula:

N(x)= -0.3x^2 + 6x + 15

X represtents the number of days since the concert was first announced. I need to find out when daily ticket sales will peak and how many tickets will be sold on that day. How do i work out this problem I dont know the first place to start! please help.

Algebra - bobpursley, Sunday, October 12, 2008 at 6:41pm
If you are not in Calculus, then I would graph the equation to find x for the maximum sales.
- Algebra - Laura, Sunday, October 12, 2008 at 6:47pm
  So I should find the vertex?
Algebra - Damon, Sunday, October 12, 2008 at 6:49pm
I assume no calculus, therefore we must look at the shape of this curve.
it is of form ax^2 + bx + c, a parabola
y = -.3 x^2 + 6 x + 15
we need to find the vertex
complete the square
y/-.3 = x^2 +6/-.3 x +15/-.3
x^2 - 20x -50 = -3.33 y
x^2 -20 x = -3.33 y +50
x^2 -20 x +100 = -3.33y +150
(x-10)^2) = -3.33 ( y - 45)
vertex at (10,45)
10 days, 45 tickets

Answer this Question

Related Questions

algebra - N(x)=-0.6^2+15.6x+12, where x is the number of days since the concert ...
algebra - The number of tickets sold each day for upcoming perfomance of Handel...
Math/Algebra - The number of tickets sold each day for an upcoming performance ...
Algebra 2 - The number of tickets sold each day for an upcoming performance of ...
algebra - The number of tickets soldeach day for an upcoming performance of ...
algebra - The number of tickets sold each day for an upcoming performance of ...
Math - The equations 5x+2y=48 and 3x+2y=32 represent the money collected from ...
Algebra - One number is 3 times another. If the sum of their reciprocals is 4, ...
math - The number of tickets sold each day for an upcoming performance of Hanel...
Algebra - You provide the manager with a quadratic equation that models the ...

For Further Reading

First Name:
School Subject:
Answer: