You buy 13 gallons of gasoline at p dollars per gallon and pay $29.25. Write an equation to find the price of one gallon of gasoline. The price of one gallon of gasoline

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