Is this expression equivalent 20 divided by 5 and 5 divided by 20

You invested $5000 between two accounts paying 4% and 9% annual interest, respectively. if the total interest earned for theyear was $350, how much was invested at each rate? $was invested at 4% andwas invested at 9%.

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

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?