Quadratic equations
posted by Marysvoice .
OK. I think I have my head around most of this but for one question. I have plotted a graph with the quadratic equation tickets=02x^2+12x+11.
My graph opens down and shows I will sell tickets for 60 days peaking at the vertex at 30 days where I sell 191 tickets.
Now I have to use the quadratic equation to determine the last day that tickets will be sold. (its the 60th day)I need to write my answer in terms of the number of days after ticket sales begin. I wish they could just use terms instead of words. How do I write the equation to answer the question?

I think you left out a decimal point in your equation. It should read
N = 0.2x^2 + 12x + 11
where N is the number sold on day x. That does result in a maximum of 191 on day 30.
If you assume that tickets stop being sold when N=0, then solve
0.2x^2 + 12x + 11 = 0 for that day.
That's the same at
x^2 + 60 x +55 = 0
The answer is x = 60.9 days
After 60 days, the number sold becomes negative, so the equation can no longer be valid. 
Got it. Thank you
Respond to this Question
Similar Questions

Quadratic equations
I need to provide a quadratic equation that models the number of expected tickets sold each day x. (x=1 is the day tickets go one sale). tickets=0.2x^2+12x+11 
alagebra
Suppose you are an event coordinator for a large performance theater. One of the hottest new Broadway musicals has started to tour, and your city is the first stop opn the tour. You need to supply information to anticipate staffing … 
quadratic equation
suppose you are an event corrdinator for a large performance theater. One of the hottest new broadway musicals has started to tour, and your city is the first stop on the tour. You need to supply information about projected ticket … 
math
suppose you are an event corrdinator for a large performance theater. One of the hottest new broadway musicals has started to tour, and your city is the first stop on the tour. You need to supply information about projected ticket … 
math
suppose you are an event corrdinator for a large performance theater. One of the hottest new broadway musicals has started to tour, and your city is the first stop on the tour. You need to supply information about projected ticket … 
math
A)Use the quadratic equation: Tickets=0.2^2+12x+11, to determine the last day the that tickets will be sold.(Note: write answer in terms of the number of days after ticket sales begin, x=1 is the day tickets go on sale) B)Will tickets … 
Algebra
Living in or near a metropolitan area has some advantages. Entertainment opportunities are almost endless in a major city. Events occur almost every night, from sporting events to the symphony. Tickets to these events are not available … 
quadratic equations
Suppose you are an event coordinator for a large performance theater. One of the hottest new Broadway musicals has started to tour and your city is the first stop on the tour. You need to supply information about projected ticket sales … 
Algebra
You provide the manager with a quadratic equation that models the expected number of ticket sales for each day x. (x = 1 is the day tickets go on sale). Tickets = 0.6x2 + 12x + 11 . Describe what happens to the ticket sales as time … 
Mat/117 App F
1. Suppose you are an event coordinator for a large performance theater. One of the hottest new Broadway musicals has started to tour and your city is the first stop on the tour. You need to supply information about projected ticket …