Which of the following can be used to represent the complement of event X?

This is geometry. could anyone ? i can't fail this class. my grade is quite low already.

Xto the second power plus 14x plus 48. what are the factors? we are doing factoring trinomials with a=1

Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label