Solve the equation by completing the square.x2 + 8x = 3
A. {-4 ± 2
}
B. {-4 ± 
}
C. {4 + 
}
D. {-1 ± 
}
Answer: B
Mathematics
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Evaluate the expression.
?
?
A. -1 B. 9 C. 8 D. 1 E. 7
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Write the number in scientific notation.0.000000616014
A. 6.16014 × 106 B. 6.16014 × 10-7 C. 6.16014 × 107 D. 6.16014 × 10-6
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Solve the equation. Use the multiplication axiom.20x = 0
A. {1} B. {20} C. {-20} D. {0}
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Use a calculator to find the approximate value of the expression. Round the answer to two decimal places.cos 78°
A. -0.91 B. 0.21 C. 0.16 D. -0.86
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