Which is an example of identity property of zero ?

Which is the completely factored from of xy^3-x^3y

True or false? a circle could be circumscribed about the quadrilateral below.

Players on the school soccer team are selling candles to raise money for an upcoming trip. each player has 24 candles to sell. if a player sells 4 candles a profit of$30 is made. if he sells 12 candles a profit of $70 is made