To convert degrees Fahrenheit (°F) to degrees Celsius (°C), we can use the following equation:
\[ °C = \frac{°F - 32}{1.8} \]
Now, let's convert 77°F to °C using the formula:
\[ °C = \frac{77 - 32}{1.8} \]
Calculating this step by step:
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Subtract 32 from 77:
\[ 77 - 32 = 45 \]
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Divide by 1.8:
\[ °C = \frac{45}{1.8} \approx 25 \]
Therefore, 77°F is approximately 25°C.
Among the options provided, the correct equation is:
\[ °F = 1.8°C + 32; \quad 25°C \]
To summarize:
- The correct equation is: \( °F = 1.8°C + 32 \)
- The value of 77°F in °C is approximately 25°C.