Park rangers notice a negative correlation between the number of available campsites in a park and the amount of litter on the park’s trails. which variable is most likely the lurking variable that explains the correlation? number of visitors to the park density of trees in the park number of eagles spotted in the park age of trees in the park

How do i do this using elimination 2x+3y=12 x-y=6

Which statement describes surface features called maria on the moon

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?