Erin bought her sister balloons, a cake, and a present for her birthday. the balloons were half the cost of the cake, and the present was one and a half times the cost of the cake. if Erin spent a total of $60, how much did the cake cost?

Michael gose to a theme park and rides two different roller coasters that both begin on a raised platform his height while on the first roller coaster measured in feet from the platform height can be modeled by the following graph where t is the number of seconds since the ride began