Write the complex number in rectangular form using exact values if possible. Otherwise, round to one decimal place.3(cos 225° + i sin 225°)
A. 
+ 
i
B. 
+ 
i
C. 
+ 
i
D. 
+ 
i
Answer: B
Mathematics
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Use the Gauss-Jordan method to find A-1, if it exists.A = 
A. 
B. 
C. 
D. 
Mathematics
Solve the system of equations.
A. (1, - 
), (1, 
)
B. (1, 
), (-3, 
)
C. (1, - 
), (1, 
), (-3, - 
), (-3, 
)
D. No solution
Mathematics
Rewrite with rational exponents.(
)5
A. 
5
B. (7mn)2/5
C. (7mn)5/2
D. 
Mathematics
Solve each of the following systems of equations. If the system is inconsistent or dependent, say so.x + y = 6x - y = 4
A. (-5, 2) B. (4, 2) C. (5, 1) D. No solution
Mathematics