it was a freaky weather day. the temperature started out at 9 degree celcius in the morning and went to -13 degree celcius at noon. it stayed at the temperature for 6 hours and then rose 7 degree celcius . how far below the freezing point (0 degree celcius) was the temperature at 6 pm
the temperature started at 9 degree celcius in the morning
the temperature went to -13 degree celcius at noon it stayed at the temperature for 6hrs or 6pm
then the temperature rose 7 degree celsius at 6pm = (-13)+7= -6
the freezing point=0 degree celsius
the temperature at 6pm was 6 degree below the freezing temperature
hope it helps