Find the center and radius of the circle.x2 + y2 - 2x + 6y - 71 = 0
A. (-3, 1); r = 9
B. (3, -1); r = 81
C. (1, -3); r = 9
D. (-1, 3); r = 81
Answer: C
Mathematics
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Find the acute angle A. Leave answer in decimal degrees rounded to seven decimal places, if necessary.tan A = 1.985822
A. 116.728445° B. 243.271555° C. 26.7284453° D. 63.2715547°
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Divide, when possible.2328 ÷ 50
A. 46 r28 B. 46 C. 49 r42 D. 49 r5
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Multiply.(2x - 2)(2x - 2)
A. 2x2 - 8x - 9 B. 4x2 - 8x + 4 C. 4x2 + 4x - 8 D. 2x2 - 9x + 4
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Multiply and simplify.- 
? 
A. 
B. - 
C. 
D. - 
Mathematics