Solve the equation by completing the square.x2 + 4x - 7 = 0
A. {-2 - 1
, -2 + 1
}
B. {-1 - 
, -1 + 
}
C. {-2 - 
, -2 + 
}
D. {2 + 
}
Answer: C
Mathematics
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Use logarithmic differentiation to find the derivative of y.y = (x4 + 1)5(x - 1)3x4
A. 
+ 
+ 
B. (x4 + 1)5(x - 1)3x4
C. (x4 + 1)5(x - 1)3x4(5ln(x4 + 1) + 3ln(x - 1) + 4ln x)
D. (x4 + 1)5(x - 1)3x4
Mathematics
Perform the operations.9 + 1
A. 11
B. 11
C. 10
D. 9
Mathematics
Find the unknown value.63 is 60% of what number?
A. 37.8 B. 105 C. 1050 D. 10.5
Mathematics
Solve the problem.In a probability model, which of the following numbers could be the probability of an outcome:0, 0.2, -0.01, - 
, 
, 
, 1, 1.5
A. 0, 0.2, 
, 1
B. 0, 0.2, -0.01, 1, 1.5
C. 0.2, 
, 1
D. 0, 0.2, -0.01, - 
, 
, 1
Mathematics