Add or subtract as indicated. Write your answer in the form a + bi.4i + (-7 - i)
A. 7 - 3i
B. 7 - 5i
C. -7 + 3i
D. -7 + 5i
Answer: C
Mathematics
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Provide an appropriate response. Simplify: -6 + 5(-2) - 12
A. -28 B. -34 C. -8 D. -44
Mathematics
Plot the complex number in the complex plane.-2 - i
A. 
B. 
C. 
D. 
Mathematics
Use the Gauss-Jordan method to solve the system of equations. x - y + 3z = 145x + z = 4 x + 2y + z = 0
A. (4, 0, -2) B. (0, -2, 4) C. (4, -2, 0) D. No solution
Mathematics
Solve the problem.A company has found that the marginal cost of a new production line (in thousands) is 
where x is the number of years the line is in use. Find the total cost function for the production line (in thousands). The fixed cost is $20,000.
A. C(x) = 
+ 11
B. C(x) = 9 ln(x + e) + 11
C. C(x) = 9 ln(x + e) + 20
D. C(x) = 
+ 20
Mathematics