Simplify. Write your answers in the form of a+bi, where a and b are real numbers.
+ 
A. - 
+ 
i
B. 
+ 
i
C. 
- 
i
D. - 
- 
i
Answer: D
Mathematics
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Evaluate the expression.(-7)2
A. -14 B. -49 C. 14 D. 49
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The augmented matrix is in row-echelon form and represents a system of linear equations. Solve the system using back-substitution.
A. ? B. {(8, -1)} C. {(4, 8)} D. {(-1, 8)}
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Use the given zero to find the remaining zeros of the function.f(x) = x3 - 2x2 - 11x + 52; zero: -4
A. 1 + 2
i, 1 - 2
i
B. 6 + 4i, 6 - 4i
C. 3 + 2i, 3 - 2i
D. 1 + 2i, 1 - 2i
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Find the present value of $10,000 payable in five years at 6% simple interest.
A. $7,378.38 B. $7,692.31 C. $3,203.29 D. $4,310.34 E. none of these
Mathematics