Find the sum or difference. Write the answer in standard form.(4 - 7i) + (-8 + 2i) + 2i
A. -2 - 3i
B. 12 - 5i
C. -4 - 3i
D. -4 + 3i
Answer: C
Mathematics
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Use the Gauss-Jordan method to find A-1, if it exists.A = 
A. 
B. 
C. 
D. Does not exist
Mathematics
Solve.Find the volume of the solid generated by revolving the region bounded by the curve 
the 
and the vertical line 
about the x-axis.
A. ? e B. ?(e2 - 1) C. 2?(e2 - 1) D. ?(e - 1)
Mathematics
Solve.A number less 8 is -19. Find the number.
A. 11 B. 27 C. -11 D. -27
Mathematics
Find the product and simplify. Assume all variables represent nonnegative real numbers.
? 
A. 36
B. 18
C. 72
D. 18
Mathematics