Choose all the equivalent expressions to 9(4+u)

a 9(U+4)
b (4 +U)9
c 36 + u
d u + 36
e 36 + 9u
f 9u + 36

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