 My Math Forum Use the formula F = 9/5 C + 32 to find the corresponding temperature range
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October 6th, 2016, 02:13 PM   #1
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Use the formula F = 9/5 C + 32 to find the corresponding temperature range

Why did I get these wrong? is it just the order? as 0 is warmer than -2 or is it something else?
Attached Images math.jpg (16.3 KB, 14 views) October 6th, 2016, 02:22 PM #2 Math Team   Joined: Jul 2011 From: Texas Posts: 3,002 Thanks: 1587 $F = \dfrac{5}{9}C + 32 \implies C = \dfrac{9}{5}(F-32)$ for 32F to 50F ... $C = \dfrac{9}{5}(32-32) = \dfrac{9}{5}(0) = 0$ $C = \dfrac{9}{5} (50-32) = \dfrac{9}{5} (18 ) = 32.4$ now try the other one you missed ... Thanks from topsquark October 6th, 2016, 02:40 PM   #3
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Quote:
 Originally Posted by skeeter  $F = \dfrac{5}{9}C + 32 \implies C = \dfrac{9}{5}(F-32)$ for 32F to 50F ... $C = \dfrac{9}{5}(32-32) = \dfrac{9}{5}(0) = 0$ $C = \dfrac{9}{5} (50-32) = \dfrac{9}{5} (18 ) = 32.4$ now try the other one you missed ...

so for the ones I got right I divided the answer by the reciprocal to get c alone, why do we not do that here? like 9 goes into 18, twice then 2(5) =10?

Last edited by GIjoefan1976; October 6th, 2016 at 02:57 PM. Reason: ah well it worked, I think I just missed my signs. October 6th, 2016, 03:40 PM #4 Math Team   Joined: Jul 2011 From: Texas Posts: 3,002 Thanks: 1587 I typed the initial equation for F incorrectly (my discalcula). Should be ... $F=\dfrac{9}{5}C + 32 \implies C= \dfrac{5}{9}(F-32)$ So, $F=50 \implies C=10$ Apologies. Thanks from topsquark and GIjoefan1976 October 6th, 2016, 05:29 PM   #5
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Quote:
 Originally Posted by skeeter I typed the initial equation for F incorrectly (my discalcula). Should be ... $F=\dfrac{9}{5}C + 32 \implies C= \dfrac{5}{9}(F-32)$ So, $F=50 \implies C=10$ Apologies.
Thanks as always SKEETER!!! Tags 9 or 5, f95c, find, formula, range, temperature Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Similar Threads Thread Thread Starter Forum Replies Last Post mared Algebra 1 January 5th, 2015 01:56 PM andrew22 Physics 8 January 4th, 2015 03:10 PM ABHISHEK MEENA Calculus 3 December 27th, 2012 07:43 AM football Algebra 2 April 10th, 2010 08:46 PM

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