## anonymous one year ago At travel speed "x" (constant velocity in mph), there are "y" accidents at nighttime for every 100 million miles of travel where y is given by y=-6.1x^2+752x+22620. At what travel speed does the greatest number of accidents per 100 million miles traveled occur?

y=-6.1x^2+752x+22620. this is the equation of a parabola with the shape $$\cap$$ it has a peak at the vertex when $x = \frac{-b}{2a}$ where a,b, and c are $y = a x^2 +bx +c$ match that general from with your parabola to find a and b then find the x value of the vertex.