Solve the equation by the method of your choice. Simplify irrational solutions, if possible.x2 + 18x + 66 = 0
A. {-18 ± 
}
B. {-9 ± 
}
C. {9 ± 
}
D. {9 ± 
}
Answer: B
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Use the limit definition of the partial derivative to compute the indicated partial derivative of the function at the specified point.Find 
at the point (10, 1): f(x, y) = 8 - 9xy + 8xy2
What will be an ideal response?
Find all solutions of the equation. Express the solution in radians.tan x = 
A. 
+ 2n? or 
+ 2n?
B. 
+ n?
C. 
+ n?
D. 
+ 2n? or 
+ 2n?
Use U = universal set = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}, A = {1, 2, 3, 5, 8}, B = {2, 3, 5, 7}, and C = {1, 4, 9} to find the set.
A. {1, 2, 3, 5, 7, 8} B. {0, 4, 6, 9} C. {4, 6, 9} D. {1, 4, 6, 8, 9}
Solve the problem.An exam consists of 9 multiple-choice questions and 6 essay questions. If the student must answer 7 of the multiple-choice questions and 4 of the essay questions, in how many ways can the questions be chosen?
A. 65,318,400 B. 1512 C. 540 D. 261,273,600