Question

Question #b8d21

Answer 1

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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