4(5m+6r+2) i was in class and we watched a video and i forgot how to do this

Triangle xyz has vertices x(1,3), y(0,0)

Find the distance between (7,-6) and (-3,-9)

Many newspapers carry a certain puzzle in which the reader must unscramble letters to form words. how many ways can the letters of emdangl be arranged? identify the correct unscrambling, then determine the probability of getting that result by randomly selecting one arrangement of the given letters.