Question #b8d21

1 Answer
Mar 15, 2017

Answer:

Actually in this case you do not need to do any calculations.
Centigrade freezing point #->0^oC#

Fahrenheit freezing point #->+32^oF#

#33F# is above freezing and #-15C# is below freezing

Explanation:

However; If you needed to do the calculations there are three values you need to remember. I will show you a trick about deciding how to use them

As above:

Freezing in Fahrenheit is #32^0#
Freezing in Centigrade is #0^0#

#color(red)("So there is 32 degrees difference IN THE SCALES USED")#

#color(red)("The 'MAGIC NUMBERS ARE 5, 9 AND 32")#

Fahrenheit scale numbers are greater so

#color(blue)("How to handle the 5 and 9")#

Centigrade to Fahrenheit:
Make the numbers greater so multiply by #9/5#

Fahrenheit to Centigrade
Make the numbers less so multiply by #5/9#

#color(blue)("How to handle the difference of freezing point")#

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As Fahrenheit has starting point for freezing of 32

Let the Fahrenheit temperature be #x#

Then the Centigrade equivalent is: #(x-32)xx5/9#
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Let the Centigrade temperature be #x#

Then the Fahrenheit equivalent is #(x xx9/5)+32#
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