Question 917000: Bens grandfather was listening to the weather report which indicated that the maximum for the day was going to be 30C. He wants to know what the temperature is in F
Using c/5 = (f-32)/2
Someone had helped & had gotten
9/5(30)+32
54+32
f = 86
I just don't get how we get the 9/5
Help please?
Answer by MathLover1(20850)   (Show Source):
You can put this solution on YOUR website! There are two main temperature scales:
°F, the Fahrenheit Scale (used in the US), and
°C, the Celsius Scale (part of the Metric System, used in most other countries)
They both measure the same thing (temperature!), but use different numbers:
Boiling water (at normal pressure) measures  ° in Celsius, but  ° in Fahrenheit
And as water freezes it measures  ° in Celsius, but  ° in Fahrenheit.
The scales start at a different number ( vs ), so we will need to add or subtract .
The scales rise at a different rate ( vs  ), so we will also need to multiply.
And so, to convert:
from Celsius to Fahrenheit: first multiply by  , then add
from Fahrenheit to Celsius: first subtract , then multiply by 
But can be simplified to  ,
and can be simplified to  , so this is the easiest way:
°C to °F multiply by  , then divide by , then add
°F to °C deduct , then multiply by  , then divide by
We can write each as a formula like this:
Celsius to Fahrenheit: 
Fahrenheit to Celsius: 
so, you got
|
|
|
