Form a polynomial f(x) with real coefficients having the given degree and zeros.Degree: 4; zeros: -1, 2, and 1 - 2i.
A. f(x) = x4 - x3 + 3x2 - 5x - 10
B. f(x) = x4 - x3 + x2 + 9x - 10
C. f(x) = x4 - 3x3 - 3x2 + 7x + 6
D. f(x) = x4 - 3x3 + 5x2 - x - 10
Answer: D
Mathematics
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A pitching machine throws 70% strikes and 30% balls. Five pitches will be thrown by the machine.What is the probability the machine will throw one ball and four strikes?
A. 
B. 5 × 0.3 × 0.74
C. 0.3 + 4 × 0.7
D. 0.3 × 0.74
E. none of these
Mathematics
Solve by the quadratic formula. Simplify answers. Use i notation for nonreal complex numbers.x2 - 4x + 20 = 0
A. x = 6, -2 B. x = 2 + 4i C. x = 2 ± 4i D. x = 2 ± 16i
Mathematics
Perform the indicated operation. Simplify if possible.
+ 
A. 
B. 
C. 
D. 
Mathematics