High School

Water boils at 100° Celsius or 212° Fahrenheit. Water freezes at 0° Celsius or 32° Fahrenheit.

If the weather forecaster says it will be 25° Celsius today, write and solve a linear equation to find what Fahrenheit temperature this is.

Answer :

To convert a temperature from Celsius to Fahrenheit, you can use the formula:

[tex]\[ F = \left(\frac{9}{5} \times C\right) + 32 \][/tex]

where [tex]\( F \)[/tex] is the temperature in Fahrenheit and [tex]\( C \)[/tex] is the temperature in Celsius.

Let's solve this step-by-step for the given temperature of 25° Celsius:

1. Multiply the Celsius temperature by 9/5:

[tex]\[
\frac{9}{5} \times 25 = 45
\][/tex]

2. Add 32 to the result from the first step:

[tex]\[
45 + 32 = 77
\][/tex]

Therefore, the temperature in Fahrenheit is 77° F when it is 25° Celsius.