Question

The linear equation that converts Fahrenheit $\left(F\right)$ to Celsius $\left(C\right)$ is given by the relation

$C=\frac{5F-160}{9}$
If the temperature is $86F$, what is the temperature in Celsius?

• A. $40$
• B. $30$
• C. $20$
• D. $70$

Answer 1

Answer: (B)

$30$

$C=\frac{5F-160}{9}$

If $F={86}^{\circ }F$,

Therefore, $C=\frac{5\times 86-160}{9}=\frac{430-160}{9}=\frac{270}{9}$

$={30}^{\circ }C$