Triangle abc is a right triangle. point d is the midpoint of side ab and point e is the midpoint of side ac. the measure of angle ade is 68°. the following flowchart with missing statements and reasons proves that the measure of angle ecb is 22°: which statement and reason can be used to fill in the numbered blank spaces? corresponding angles are congruent triangle sum theorem measure of angle aed is 22° corresponding angles are congruent base angle theorem measure of angle aed is 68° alternate interior angles are congruent triangle sum theorem measure of angle aed is 22° alternate interior angles are congruent triangle angle sum theorem measure of angle aed is 68°

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?