document.write( "Question 182839This question is from textbook Beginning and Intermediate Algebra
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document.write( ": I really hope someone can help me solve this equation for I didn't even know where to begin!\r
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document.write( "-An international phone call costs $2.00 for the first 3 min, plus $0.30 per minute for each minute or fractional part of a minute after the first 3 min. If x represents the number of minutes of the length of the call after the first 3 min, then 2 + 0.30x represents the cost of the call. If Jorge has $5.60 to spend on a call, what is the maximum total time he can use the phone?\r
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document.write( "Thanks for the help! \n" );
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Algebra.Com's Answer #137254 by nerdybill(7384)![]() ![]() You can put this solution on YOUR website! . \n" ); document.write( "Let x = number of minutes after the first 3 mins \n" ); document.write( "then they already provide: \n" ); document.write( "f(x) = 2 + 0.30x \n" ); document.write( "where f(x) is the cost\r \n" ); document.write( "\n" ); document.write( "Since he only have $5.60 to spend: \n" ); document.write( "5.60 >= 2 + 0.30x \n" ); document.write( "3.60 >= 0.30x \n" ); document.write( "12 minutes >= x\r \n" ); document.write( "\n" ); document.write( "Read: \n" ); document.write( "x has to to \"less than or equal\" to 12 minutes\r \n" ); document.write( "\n" ); document.write( "Since x is the minutes AFTER the first 3 then \n" ); document.write( "maximum total time <= 12+3 \n" ); document.write( "maximum total time <= 15 minutes \n" ); document.write( " \n" ); document.write( " |