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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Solve the problem.Find the derivative of the function 
at the point 
in the direction in which the function decreases most rapidly.
A. - 
B. - 
C. - 
D. - 
Mathematics
Multiply, and then simplify if possible. Assume all variables represent positive real numbers.(11
+ 5)(
- 5)
A. 11x
- 110
- 25
B. 11x - 110
- 25
C. 11x - 25
D. 11x
- 55
+ 5
- 25
Mathematics
Perform the requested operation or operations.f(x) = 3x + 13; g(x) = 3x - 1Find f(g(x)).
A. f(g(x)) = 9x + 16 B. f(g(x)) = 9x + 38 C. f(g(x)) = 9x + 12 D. f(g(x)) = 9x + 10
Mathematics
Solve.y varies directly as x. If y = 35 when x = 5, find y when x = 9.
A. 25 B. 81 C. 49 D. 63
Mathematics