Beth can swim 2 laps in 7 minutes what is beth rate in minutes per lap

Julian wrote the following numeric pattern on the board3,10,17,24,31,38.what numbers of julian's pattern are compound numbers.

When 142 is added to a number the result is 64 more then 3 times the number. option 35 37 39 41

The sum of the speeds of two trains is 720.2 mph. if the speed of the first train is 7.8 mph faster than the second train, find the speeds of each.