Divide.(2 + 7i) ÷ (5 + 3i)
A. 
+ 
i
B. - 
- 
i
C. - 
- 
i
D. 
- 
i
Answer: A
Mathematics
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How many subsets and proper subsets are in the given set?{15, 16, 17}
A. 3, 2 B. 6, 7 C. 7, 8 D. 8, 7
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Find the real or imaginary solutions by using the quadratic formula.x2 = 3 - 4x
A. {-2 ± i
}
B. {-1 ± 
}
C. {2 + 
}
D. {-2 ± 
}
Mathematics
Solve the inequality. Write the solution set in interval notation.1.2x - 3.9 > 0.4x - 0.94
A. (-?, 3.7) B. (-?, 3.69) C. (3.69, ?) D. (3.7, ?)
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Find all specified roots.Seventh roots of 1.
A. 1, cis 
, cis 
, cis 
, cis 
, cis 
, cis 
B. -1, cis 
, cis 
, cis 
, cis 
, cis 
, cis 
C. 1, cis 
, cis 
, cis 
, cis 
, cis 
, cis 
D. 1, cis 
, cis 
, cis 
, cis 
, cis 
, cis 
, -1
Mathematics