At the campus coffee cart, a medium coffee costs $ 1.25 . MaryAnne brings $ 2.00 with her when she buys a cup of coffee and leaves the change as a tip. What percent tip does she leave

What is (28 + 7 + 6 + 3) x 1/2 show your work

Consider the graph of the exponential function y=3(2)×

Quick! a survey of 57 customers was taken at a bookstore regarding the types of books purchased. the survey found that 33 customers purchased mysteries, 25 purchased science fiction, 18 purchased romance novels, 12 purchased mysteries and science fiction, 9 purchased mysteries and romance novels, 6 purchased science fiction and romance novels, and 2 purchased all three types of books. a) how many of the customers surveyed purchased only mysteries? b) how many purchased mysteries and science fiction, but not romance novels? c) how many purchased mysteries or science fiction? d) how many purchased mysteries or science fiction, but not romance novels? e) how many purchased exactly two types of books?