Write a rule for the sequence. then, find the unknown term 2.1, 4.3, 6.5, ..., 10.9

Which expression is rational? 6. , square root two, square root 14, square root 49

How can i differentiate this equation?

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