1. What are the coordinates of the center of the circle that passes through the points (1, 1), (1, 5), and (5, 5)?
A.
(5, 1)
B.
(3, 3)
C.
(2.5, 2.5)
D.
(0, 0)
2.The circle x2 + y2 = 36 is translated 5 units left and 4 units up. Where is the center of the new circle after the translation?
A.
(-5,-4)
B.
(5,-4)
C.
(-5, 4)
D.
(5, 4)
3. Which equation represents the image of circle (x 5)2 + (y + 12)2 = 169 after a translation 2 units right and 3 units down?
A.
(x - 7)2 + (y + 15)2 = 169
B.
(x - 3)2 + (y + 9)2 = 169
C.
(x+ 7)2 + (y - 15)2 = 169
D.
(x+ 3)2 + (y - 9)2 = 169
4.Describe the translation of circle (x - 1)2 + (y - 4)2 = 25 that results in an image whose equation is (x + 1)2 + (y - 5)2 = 25.
A.
Two units right and one unit down.
B.
Two units right and one unit up.
C.
Two units left and one unit down.
D.
Two units left and one unit up.
these are practice prob. so please help!
2007-04-25
07:33:12
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2 answers
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asked by
MEB
2
in
Mathematics