Solve by completing the square to obtain exact solutions.x2 + 16x + 54 = 0

A. -8 ± 
B. 8 ± 3,
C. 8 + 
D. -16 ± 3


Answer: A

Mathematics

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A. 188.4 cm3 B. 282.6 cm3 C. 70.7 cm3 D. 141.3 cm3

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Find the indicated quantity.a3, when a17 = - , a28 = - 

A. - 
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C.
D. - 

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Find the sum.1 + 2 + 3 + ... + 920

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