Write the expression in the standard form a + bi.(-
+ i)6
A. -64
+ 64i
B. -64
C. 64i
D. 64 - 64
i
Answer: B
Mathematics
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Find the torsion of the space curve.r(t) = 
i + 3tj + 
k
A. ? = 
B. ? = 
C. ? = - 
D. ? = 
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Round the whole number to its highest place value.58,874
A. 58,900 B. 58,000 C. 60,000 D. 59,000
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First round each number to one non-zero digit. Then perform the calculation using the rounded numbers to obtain an estimate.318.44 ÷ (41.9)
A. estimate: 7.5 B. estimate: 8.5 C. estimate: 7.6 D. estimate: 8
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Solve the quadratic equation by completing the square.x2 + 10x + 9 = 0
A. x = 1, x = 9
B. x = 18, x = -9
C. x = -1, x = -9
D. x = 
, x = 
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