What is the distance between (-5,-5) and (-9,-2)

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

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

Fast! find the length of cu. the triangles are similar. show your work.