A boat rental company has two kinds of boats, rowboats and motorboats. The expressions below represent the cost,
in dollars, for renting each kind of boat for x number of hours.
Cost of a rowboat rental: 8.50x +3
Cost of a motorboat rental: 17.50x +25
Which expression shows how many more dollars it costs to rent a motorboat than a rowboat for x hours?
*8x +22
*9x + 22
*9x + 28
*26x + 28