The temperature in Mariah’s town was 5.2 degrees Fahrenheit at midnight. The temperature decreased at a steady rate of 1.1 degrees Fahrenheit per hour until 7:00 a.m. From 7:00 a.m. through noon, the temperature increased by a total of 4.9 degrees Fahrenheit. What was the temperature at noon?
Negative 7.4 degrees Fahrenheit
Negative 2.5 degrees Fahrenheit
2.4 degrees Fahrenheit
7.4 degrees Fahrenheit
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Step-by-step explanation:
Temperature of town at midnight = 5.2° F
Temperature at 7:00 PM = 5.2°F - 1.1°F/hour×7 hours
= 5.2°F - 7.7°F = -2.5°F
Temperature at 12:00 PM = -2.5°F + 4.9°F = 2.4°F
Hence, the temperature at 12:00 PM noon will be 2.4°F
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