I found some of mmy cousins old work

How do i find the missing angle measure in a polygon

Simplify this expression. 8x 16(x + y)

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