Write the standard equation for the circle.Center at (10, 9), passing through (13, 13)
A. (x - 9)2 + (y - 10)2 = 9
B. (x + 10)2 + (y + 9)2 = 25
C. (x + 9)2 + (y + 10)2 = 9
D. (x - 10)2 + (y - 9)2 = 25
Answer: D
Mathematics
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Establish the identity.
= 
What will be an ideal response?
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Multiply.(a + 8)(a + 1)
A. a2 + 9a + 8 B. a2 + 9a + 9 C. 2a + 8 D. 2a2 + 8
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