The time required to bake a chocolate
muffin, y, is 2 minutes more than the
time required to bake a vanilla muffin, x.

At a pizza shop 70% of the customers order a pizza 25% of the customers order a salad and 15% of the customers order both a pizza and a salad if s customer is chosen at random what is the probability that he or she orders either a pizza or a salad