Perform the indicated operation and simplify. Write the answer in the form a + bi.(7 - 5i) + (9 + 8i)
A. -16 - 3i
B. 16 - 3i
C. 16 + 3i
D. -2 + 13i
Answer: C
Mathematics
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Solve the problem.Find the vector from the origin to the center of mass of a thin triangular plate (uniform density) whose vertices are A(6, 1, 5), B(5, 3, 9), and C(2, 5, 9).
A. 
i - 2j - 
k
B. 
i - 1j - 
k
C. 
i + 3j + 
k
D. 
i - 3j - 
k
Mathematics
Solve the system of equations by elimination.
A. (-3, 1) B. (1, -3) C. infinitely many solutions D. no solution
Mathematics
For the given functions f and g, evaluate the following composite function.f(x) = 5x + 8, g(x) = 
; Find (g ? f)(3).
A. 
B. 
C. 
D. 
Mathematics
Find an equivalent equation in rectangular coordinates.r - 6 sin ? = 5 cos ?
A. 
- 6y = 5x
B. x2 + y2 = 0
C. x2 + y2 - 6y = 5x
D. x2 + y2 + 6y = 5x
Mathematics