1.	Write the standard form of the equation of the circle that is tangent to the y-axis and has its center at (5, –3).
		A.	(x + 5)2 + (y – 3)2 = 25
		B.	(x – 5)2 + (y + 3)2 = 25
		C.	(x + 5)2 + (y – 3)2 = 5
		D.	(x – 5)2 + (y + 3)2 = 5
		Hint
	2.	The equation of a circle is 3x2 + 3y2 – 6x + 12y – 24 = 0. Find its center and radius.
		A.	(–1, 2); 13	B.	(1, –2);
		C.	(1, –2); 13	D.	(–1, 2);
		Hint
	3.	Write the general form of the equation of the circle that passes through the points at (4, 2), (–3, 1), and (–2, –6).
		A.	x2 + y2 + 2x – 4y – 20 = 0
		B.	x2 + y2 + 2x + 4y – 20 = 0
		C.	x2 + y2 – 2x + 4y – 20 = 0
		D.	x2 + y2 – 2x – 4y + 20 = 0
		Hint
	4.	Write the equation of the circle that is tangent to the line with equation x + y = –3 and has its center at (4, –1).
		A.	(x + 4)2 + (y – 1)2 = 18	B.	(x – 4)2 + (y + 1)2 = 18
		C.		D.
		Hint
	5.	Write the equation of a circle that has a diameter with endpoints at (1, 0) and (5, 4).
		A.	(x + 3) 2 + (y + 2) 2 = 8
		B.	(x - 3) 2 + (y - 2) 2 = 64
		C.	(x - 3) 2 + (y - 2) 2 = 8
		D.	(x + 3) 2 + (y - 2) 2 = 64
		Hint