Plot the complex number and find its absolute value.
?
-3 + 9i
?
A. ?
?
B. ?
?
C. ?
?
D. ?
?
E. ?
?
Answer: C
Mathematics
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Solve the linear system using an inverse matrix. x + 2y + 3z = -11 x + y + z = -42x + 2y + z = -2
A. (7, -28, -17) B. (-44, 8, -2) C. (-3, 5, -6) D. (-29, -35, -10)
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Provide the requested information about the circular function.What is the period of y = cos x?
A. 4?
B. 2?
C. ?
D. 
Mathematics
Evaluate the algebraic expression for the given values of the variables.9 ? c + 6(d + 5) + 1, for c = 6, d = 5
A. 1081 B. 120 C. 115 D. 90
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Factor out the greatest common factor. Simplify the factors, if possible.15wx - 20wy - 25wz
A. 5w(3x - 20wy - 25wz) B. 5w(3x - 4y - 5z) C. 5(3wx - 4wy - 5wz) D. 15w(x - 20y - 25z)
Mathematics