SOLUTION: In the equation -0.2x^2+12x+11, would the graph open up or down? What would happen to sales as time goes by? Last day of sales? Will tickets peak, highs,lows etc. How many will be

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equation Customizable Word Problems -> SOLUTION: In the equation -0.2x^2+12x+11, would the graph open up or down? What would happen to sales as time goes by? Last day of sales? Will tickets peak, highs,lows etc. How many will be       Log On


   

Question 327477: In the equation -0.2x^2+12x+11, would the graph open up or down? What would happen to sales as time goes by? Last day of sales? Will tickets peak, highs,lows etc. How many will be sold? What is the point of the vertex? I know I should use the quadratic equation but am at a loss of where to go next.
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
-0.2x^2+12x+11
+graph%28+500%2C+500%2C+-100%2C+100%2C+-100%2C+200%2C+-.2x%5E2+%2B12x+%2B11%29+ (graph 500x500 pixels, x from -100 to 100, y from -100 to 200 -.2x^2 +12x +11 ).
Axis(x)=-b/2a
Axis(x)=-12/-.2
Axis(x)=30 ans.