At 5 a.m., the temperature at an airport was −9.4°F . Six hours later, the temperature was 2.8°F . Which expressions represent the total temperature change over the six hours? Select each correct answer. |−9.4+2.8| −9.4+2.8 |2.8−(−9.4)| |2.8+(−9.4)| 2.8+(−9.4) |−9.4−2.8|