16. lionel finished four rounds of a golf
tournament. his combined total score
after playing all four rounds was –10. his
scores on the first three rounds were
-4, -2, and -6. what was his score on
the last round? justify your answer.

You coordinate volunteers for litter cleanup in local parks. your spreadsheet lists drivers and the number of seat belts in each driver’s car. the spreadsheet calculates the number of drivers (d) and the total number of seat belts (s). you want to know the maximum number of volunteers, besides drivers, that can be transported to the park in a single trip given that each person must have a seat belt of their own.