21. On a coordinate grid, Lola's house is located at (1, 2). The library is located at (1,10) and Lola's school is located at (7, 2). Each unit on the
grid represents 1 mi. How far is it from the library to Lola's school?
F 100 mi G10 mi H8 mi
06 mi

Ineed in figuring out this problem.

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?

The square root of 9x plus 7 plus the square rot of 2x equall to 7