pls help i have no idea if ou can do this i will put the other nine questions too pls answer those ill give out sm points and brainoliest

Which expression gives you the distance between the points (5,1)and(9,-6)

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

If there are 3.281 feet in 1 meter, how many inches are in one centimeter