Astudent finds the slope of the line between (20,1) and (1,17) they write 1-17/ 1-20 what mistake did they make?

5/6+7/8what is the answer sealsdbdbshd

Ineeeeed this is due tomorrow and i dont know the answer can you find all the exponents

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?