What is z 12-19?

What is the nth term for the sequence -2 1 6 13 22 33? Does a triangular pyramid have parallel edges? How many angles are formed in a 120 noncollinear rays? What are 2 equivalent fractions for 6 over 21? If you are 55 in 2014 what year were you born? How many hours between 7AM to 3PM? What are alternatives to radical neck dissection? 3 7 times 1 6? Does a polygon has more number of sides or angles? What is to say something is greater than it is go beyond the truth? How do you write six tenths of a kilometer? Are 18 and 81 both odd numbers? What is the significance of three thousand and six hundred seconds of the time that flies? How do you write 19543 in words? How do you write six million four hundred thousand six and six tenths in standard notation? What time period were roman numerals used? What is distance between two points in the plane? What is the difference between reagent blank and sample blank? When 15 is subtracted from15 of an unknown number the result is 10? What are Hindu Arabic numerals system and Roman System what are the basic symbols used?