San Diego, Calif. has an average July temperature of 70.9 degrees Fahrenheit. What is this average if temp is expressed in Celsius

Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter8: Introduction To Functions
Section8.9: Direct Variation
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San Diego, Calif. has an average July temperature of 70.9 degrees Fahrenheit. What is this average if temp is expressed in Celsius? (Round to two decimal places.)

[Hint: Conversion between Fahrenheit and Celsius is a linear transformation: 
Fahrenheit = Celsius*1.80 + 32, or 
Celsius = Fahrenheit*(1/1.80) - (32/1.80)]

 
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