document.write( "Question 1198073: the monthly cost in dollars of a long-distance phone plan is a linear function of the total calling time in minutes. The monthly cost for 43 minutes is $13.42 and the monthly cost for 91 minutes is $19.66. What is the monthly cost for 55 minutes? \n" ); document.write( "

Algebra.Com's Answer #831595 by ikleyn(52797) $\"\"$ $\"About$

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\n" ); document.write( "the monthly cost in dollars of a long-distance phone plan is a linear function
\n" ); document.write( "of the total calling time in minutes.
\n" ); document.write( "The monthly cost for 43 minutes is $13.42 and the monthly cost for 91 minutes is $19.66.
\n" ); document.write( "What is the monthly cost for 55 minutes?
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document.write( "The price per minute is  m =  = 0.13 dollars per minute.\r\n" );
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document.write( "The montly cost for 55 minutes is  13.42 + m*(55-43) = 13.42 + 0.13*(55-43) = 14.98  dollars.    ANSWER\r\n" );
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