My Math Forum inequality problem and inequalities

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 November 13th, 2013, 10:36 PM #1 Newbie   Joined: Nov 2013 Posts: 2 Thanks: 0 inequality problem and inequalities Hello to all friends of the mymathforum I'm new in this community. Thank you! I would like to help me with this exercise, I have to deliver today: The temperatures in a 24 hour period between -4 ° F and 23 ° F, What was the variation in Celsius? (use F = 9/5 C +32)
 November 14th, 2013, 04:38 AM #2 Senior Member   Joined: Jul 2013 From: Croatia Posts: 180 Thanks: 11 Re: inequality problem and inequalities $F=\frac{9}{5} C+32$ multiply by 5 $5F=9C+160$ $9C=5F-160$ $C=\frac{5}{9}F-\frac{160}{9}$ Now just plug in F=-4 and F=23 ( you will get-20°C and C=-5°C)
 November 14th, 2013, 07:45 AM #3 Global Moderator   Joined: Dec 2006 Posts: 19,712 Thanks: 1806 Or use the equivalent formula C = 5(F - 32)/9.
November 14th, 2013, 12:59 PM   #4
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Re: inequality problem and inequalities

Quote:
 Originally Posted by crom $F=\frac{9}{5} C+32$ multiply by 5 $5F=9C+160$ $9C=5F-160$ $C=\frac{5}{9}F-\frac{160}{9}$ Now just plug in F=-4 and F=23 ( you will get-20°C and C=-5°C)
Thanks you ver much

Quote:
 Originally Posted by skipjack Or use the equivalent formula C = 5(F - 32)/9.
Thanks you MOD!

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