Whats the function of this piecewise functions?

1. what is the phythaforean theorem? 2.what do we use it for? 1.what is the distance formula ? 2.what do we use it for?

Write a fraction less than 1, which has a denominator of 6 and is greater than 3/4 plz answer !

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible