1. a pair of supplementary angles is shown. one angle measures 10x and the other angle measures 70 degrees.

what is the value of x?

a) 10°
b) 11°
c) 20°
d) 21°

2. a right angle is shown divided in two parts. the measure of the angle of one part is 30 degrees and the measure of the other part is 5x plus 15 degrees. what is the value of x?

a) 3
b) 9
c) 12
d) 15

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?