Question

Use the formula Upper F equals nine fifths Upper C plus 32 to convert negative 25 degrees C to degrees Fahrenheit.What formula gives the conversion from degrees Fahrenheit to degrees Celsius?
A. C=F-32-(5/9)
B. C=(5/9)(F-32)
C. C=(9/5)(F+32)
D. C=(9/5)(F-32)

Answer 1

Answer: B.  $C=\dfrac{5}{9}(F-32)$

Step-by-step explanation:

The given formula : $F=\dfrac{9}{5}C+32$

To convert this formula in terms of C , we first Subtract 32 on both sides , we get

$F-32=\dfrac{9}{5}C$

Now multiply 5 on both the sides , we get

$5(F-32)=9C$

Divide both sides by 9 we get

$\dfrac{5}{9}(F-32)=C$

OR

$C=\dfrac{5}{9}(F-32)$

Therefore , the formula gives the conversion from degrees Fahrenheit to degrees Celsius will be :-

$C=\dfrac{5}{9}(F-32)$

Hence, the correct answer : B.  $C=\dfrac{5}{9}(F-32)$