document.write( "Question 149129: A carpenter charges a set fee for a job in addition to an hourly charge. He charges first customer $150 for a 3 hr job. He charges another customer $180 for a 6 hr. job. How much would he charge for a 9 hr. job? \n" ); document.write( "
Algebra.Com's Answer #109401 by mangopeeler07(462)\"\" \"About 
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$150 for a 3 hr job. $180 for a 6 hr. job. \r
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\n" ); document.write( "\n" ); document.write( "Jobs differ by three hours and thirty dollars, so ten dollars an hour.\r
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\n" ); document.write( "\n" ); document.write( "Base price=price for three hours minus ten per hour
\n" ); document.write( "Base price=150-10(3)
\n" ); document.write( "150-30
\n" ); document.write( "Base price=120\r
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\n" ); document.write( "\n" ); document.write( "10 dollars an hour, so total price=
\n" ); document.write( "base price plus price per hour times the hours\r
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\n" ); document.write( "\n" ); document.write( "total price of nine hours=
\n" ); document.write( "120+10(9)
\n" ); document.write( "120+90
\n" ); document.write( "210\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Price for nine hours:
\n" ); document.write( "$210
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