Use a graphing calculator to solve the inequality.x2 - 3.87x - 57.49 < 0(Give approximations rounded to the nearest hundredth.)
A. (-?, -5.89) ? (9.76, ?), or {x
x < -5.89 or x > 9.76}
B. (-9.76, 5.89), or {x
-9.76 < x < 5.89}
C. (-?, -9.76) ? (5.89, ?), or {x
x < -9.76 or x > 5.89}
D. (-5.89, 9.76), or {x
-5.89 < x < 9.76}
Answer: D
Mathematics
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Use the data set {0, 4, 4, 8, 4, 16} to answer the following question(s).The mean of the data set is
A. 4.
B. 6.
C. 2.
D. 
.
E. none of these
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Find the real solutions, if any, of the equation. Use the quadratic formula.x2 - 4x - 13 = 0
A. {4 + 
, 4 - 
}
B. {-2 + 
, -2 - 
}
C. {2 + 
, 2 - 
}
D. {2 + 
, 2 - 
}
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Evaluate the piecewise-defined function at the indicated value.f(x) = 
; f(7)
A. -49 B. 9 C. 73 D. 49
Mathematics
Solve.3x2 - 3y2 = 147 4x2 + y2 = 196
A. (-7, 0), (7, 0)
B. (0, -7), (0, 7)
C. (-7, -14
), (-7, 14
), (7, -14
), (7, 14
)
D. (-7, 14
), (7, 14
)
Mathematics