Add or subtract.(6 - 3i) + (3 + 9i)
A. -9 - 6i
B. 9 + 6i
C. 3 + 12i
D. 9 - 6i
Answer: B
Mathematics
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Give the exact value.sec 
A. 
B. 
C. 
D. 
Mathematics
Factor.12x2 - 8xy - 15y2
A. (12x - 3y)(x + 5y) B. (2x + 3y)(6x + 5y) C. (2xy - 3)(6xy + 5) D. (2x - 3y)(6x + 5y)
Mathematics
The function f(x) changes value when x changes from x0 to x0 + dx. Find the approximation error 
. Round your answer, if appropriate.f(x) = 
, x0 = 3, dx = 0.8
A. 0.20517 B. 0.16362 C. 0.0174 D. 0.01223
Mathematics
Complete the horizontal analysis for the comparative income statement. Round to the nearest tenth of a percent.
A. 13.9%, -140.0%, 14.2%, -7.8%, 47.8%, -118.7%, 48.7% B. 15.2%, -66.7%, 15.4%, -2.0%, 37.5%, 27.3%, 38.3% C. 17.9%, -40.0%, 18.1%, -1.9%, 60.1%, 37.5%, 62.0% D. -17.9%, 40.0%, -18.1%, 1.9%, -60.1%, -37.5%, -62.0%
Mathematics