Combine the complex numbers.8i + (-7 - i)
A. -7 + 9i
B. -7 + 7i
C. 7 - 7i
D. 7 - 9i
Answer: B
Mathematics
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Evaluate the integral.
A. 24 B. 0 C. 16 D. 23.2
Mathematics
Solve the problem.A figure skater must trace a figure eight on the ice that consists of two perfect circles, each with a radius of 9 ft. How far does the skater go in tracing the figure eight?(Use 3.14 for ? .)
A. 28.26 ft B. 113.04 ft C. 26.26 ft D. 56.52 ft
Mathematics
Evaluate, if possible
A. 
B. Not a real number
C. 8
D. 4096
Mathematics
Find the determinant.det 
A. 54 B. 63 C. -63 D. 33
Mathematics