The temperature of a substance was -3° c the temperature of the substance decreased by 6° c after 4 hours after another 3 hours the temperature decreased by 5° c use a number line to determine the temperature of the substance at the end of seven hours
To determine the temperature of the substance at the end of seven hours, we need to follow the given information step by step on a number line:
Start: -3°C
After 4 hours:
-3°C - 6°C = -9°C
After 4 hours, the temperature is -9°C.
After another 3 hours:
-9°C - 5°C = -14°C
After 7 hours, the temperature is -14°C.
Therefore, the temperature of the substance at the end of seven hours is -14°C.