Type the correct answer in each box. A circle is centered at the point (5, -4) and passes through the point (-3, 2).
The equation of this circle is (x + )2 + (y + )2 = .

There are 18 female students and 16 male students in a class. which of the following expresses the ratio of female students to male students in simplest form? а) 10 b) 9 to 8 c) 8: 9 d)18/16