Betty and dyan can pick 8 quarts of strawberries in 45 minutes if they work together. it takes dyan x minutes to pick 8 quarts of strawberries alone. what does the denominator of the rational expression 45x−1045x-10 mean in the context of this situation?

Simply 8x squared + 5(7x squared- x) - 2x =

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

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?