Use a calculator to find an approximate solution to the equation. Round your answer to the nearest thousandth.x2 + 7x = -4
A. {0.531, -7.531}
B. {6.372, 0.628}
C. {-4.128, -4.128}
D. {-0.628, -6.372}
Answer: D
Mathematics
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Write the domain of the rational function in interval notation.f(x) = 
A. (-?, -7) ? (-7, ?) B. (-?, -8) ? (-8, ?) C. (-?, -7) ? (-7, 8) ? (8, ?) D. (-?, 8) ? (8, ?)
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Perform the indicated operation.20 lb 11 oz - 6 lb 10 oz
A. 14 lb 1 oz B. 26 lb 5 oz C. 27 lb 5 oz D. 13 lb 1 oz
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Use a calculator to find the value of the expression rounded to two decimal places.tan-1 (-1.9)
A. -27.76 B. -1.09 C. -0.48 D. -62.24
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Simplify the expression.- 
(z - 11) - 
z
A. 
z + 
B. 
z - 
C. 
z + 11
D. - 
z + 
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