The previous statements are examples of number sentences. A number sentence is a statement of equality
between two
expressions.
tions
A number sentence is said to be true if both numerical
expressions are
If both numerical expressions don't equal the same
number, we say the number sentence is
True and false statements are called truth values.
hould
afios

Answer this question only if you know the 30 points and

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?

What is the maximum of the sinusoidal function