document.write( "Question 1113995: A plumber charges $80 for a service call plus $30 per hour.
\n" ); document.write( "a. Find a linear function that represents the total daily charges C, in dollars, as a function of the time t, in hours, spent at a given location.
\n" ); document.write( "b. If the total charge was $140, how many hours did he work?
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Algebra.Com's Answer #729015 by addingup(3677)\"\" \"About 
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80 + 30t = total charge
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\n" ); document.write( "80 + 30t = 140
\n" ); document.write( "30t = 60
\n" ); document.write( "t = 60/30 = your answer
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