A real quadratic equation without real zeros always has two conjugate imaginary zeros. What does it mean for the two zeros to be conjugate? a) They have the form a±bi where a and b are real numbers.
b) They have the form ±a+bi where a and b are real numbers.
c) They have the form a±√b where a and b are real numbers (b not negative).
d) They have the form ±a+√b where a and b are real numbers (not negative).

The triangles are similar. what is the value of x? show your work.

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?

Neoli is a nurse who works each day from 8: 00 am to 4: 00 pm at the blood collection centre. she takes 45 minutes for her lunch break. on average, it takes neoli 15 minutes to collect each sample and record the patient's details. on average, how many patients can neoli see each day?