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.
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
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