1. The temperature at 5 a.m. on a day in January was -15° Celsius. By 6 a.m. the temperature had fallen 5 degrees. Use a signed number to represent the temperature at 6 a.m.
2. A diver starts out at 127 feet below the surface and then swims downward another 23 feet. Use
a signed number to represent the diver's current depth
3. During the PGA 2008 Wyndham Championship tournament, the winner, Carl Pettersson, had scores of -6, -9, -4, and -2. What was his total score for the tournament?
4. The Solheim Cup, a biannual pro women golfers' tournament between an American team and a European team, scores holes won. During the 2007 Solheim Cup, the winners, the American team, had a score of 16. The losing team, the Europeans, had a score 4 less than the Americans' score. What was the European team's score?