What number is equivalent to -55i to the second power

Two lines that do not intersect are skew. always sometimes or never

Select the correct answer. what is the exact value of sin (157.5°)? a. 'sqrt(2 - sqrt(2))/2 b. *"-"'sqrt(2 + sqrt(2))/29 c.'sqrt(2 + sqrt(2))/4" d. "-"sqrt(2 + sqrt(2))/4)

In which direction does the left side of the graph of this function point? f(x) = 3x3 - x2 + 4x - 2