The frequency table shows Sam's record in swimming Year Number of medals 2008 2009 2010 2012 2013 Based on this record, what is the probability of picking up a medal won by him in the years 2009 or 2012
The function ƒ is defined by ƒ(x) = (x + 3)(x + 1). the graph of ƒ in the xy-plane is a parabola. which interval contains the x-coordinate of the vertex of the graph of ƒ?