please help me its the last question for the assignment. Andres works as a customer service representative. He receives a base salary of $40,500, plus $1,000 for each year he has worked at his company. Which equation represents Andres' salary, s, if he has worked at his company for a certain number of years, y?
A. s = 40,500 + 1,000y
B. s = 40,500 - 1,000y
C. s = 1,000 + 40,500y
D. s = 1,000y - 40,500

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?