45.7°f = what in celsius

Is this the equation I should be using

C = °F-32/1.8

C= 45.7-32/1.8= 7.6

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- Sep 17th 2012, 03:19 PMLouisana1changing celsius to F
45.7°f = what in celsius

Is this the equation I should be using

C = °F-32/1.8

C= 45.7-32/1.8= 7.6 - Sep 17th 2012, 03:45 PMskeeterRe: changing celsius to F
check it yourself ...

Fahrenheit to Celsius Converter - Sep 17th 2012, 04:12 PMemakarovRe: changing celsius to F
- Sep 20th 2012, 02:01 AMkraj8995Re: changing celsius to F
Your answer is correct but the correct equation for Fahrenheit to Celsius is :

(F - 32) x 5/9 = C

where F=45.7

Thus,

(45.7-32)*5/9=7.6

Composition of Functions - Sep 20th 2012, 02:14 AMMarkFLRe: changing celsius to F
To derive the formula, use the freezing and boiling points of water, to get the slope of the line:

$\displaystyle \frac{\Delta C}{\Delta F}=\frac{100-0}{212-32}=\frac{5}{9}$

Now, use the point-slope formula:

$\displaystyle C-0=\frac{5}{9}(F-32)$

$\displaystyle C(F)=\frac{5}{9}(F-32)$ - Sep 20th 2012, 06:31 AMHallsofIvyRe: changing celsius to F
You mean C= (F- 32)/1.8. What you wrote really means C= F- (32/1.8)

You can check that is correct by checking the "easy values". The freezing point of water is 0 C and 32F:

(32-32)/1.8= 0/1.8= 0 so that is correct.

The boiling point of water is 100 C and 212 F:

(212- 32)/1.8= 180/1.8= 100 so that is correct.

Since this is a "linear" equation and two points determine a line you know that is the correct formula for any F.