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?

Amayoral candidate would like to know her residents’ views on a public open space before the mayoral debates. she asks only the people in her office. her co-workers are an example of a census population convenience sample simple random sample