Verified Answer :

17) 146 min.
18) 5 hrs and 31 min
19) -1/6

  1. 2 hrs and 26 minutes = 120 min + 26 min = 146 minutes

    18. 4:14 to 9:45.....5 hrs 31 min

    19. 5 1/2 - 4 2/3 =
          11/2 - 14/3 =
           33/6 - 28/6 =
           5/6