document.write( "Question 557511: A call to Tucson from a pay phone in Chicago cost 85 cents for the first minute and 27 cents for each additional minute or portion of a minute. If a student has $9.50 in change, how long can she talk? \n" ); document.write( "
Algebra.Com's Answer #362635 by TutorDelphia(193)![]() ![]() You can put this solution on YOUR website! The hardest part of this question is the term each additional minute. If I make a call that's 10 minutes long, that'd be 1 minute plus 9 additional minutes. If my call was 15 minutes long, that'd be 1 minute plus 14 additional minutes. In general, its the flat rate minute, plus m-1 where m is the total number of minutes. \r \n" ); document.write( "\n" ); document.write( "As an equation we get: \n" ); document.write( "9.50=.85+.27(m-1) \n" ); document.write( "distribute the .27 \n" ); document.write( "9.50=.85+.27m-.27 \n" ); document.write( "combine like terms \n" ); document.write( "9.50=.58+.27m \n" ); document.write( "subtract .58 from both sides \n" ); document.write( "8.92=.27m \n" ); document.write( "divide both sides by .27 \n" ); document.write( "And we get 33.03 \n" ); document.write( "So that'd by 33 minutes \n" ); document.write( " \n" ); document.write( " |