7a^2+3a-9−7a 2 +3a−9 minus, 7, a, squared, plus, 3, a, minus, 9 from 5a^2-6a-45a 2 −6a−45, a, squared, minus, 6, a, minus, 4. Your answer should be a polynomial in standard form.

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