document.write( "Question 264260: An overseas phone call is charged at one rate (a fixed amount) for the first minute and at a different rate for each additional minute. If a 7 minute call costs $10, and a 4 minute call costs $6.40, find each rate. \n" ); document.write( "
Algebra.Com's Answer #194638 by mananth(16946)\"\" \"About 
You can put this solution on YOUR website!
An overseas phone call is charged at one rate (a fixed amount) for the first minute and at a different rate for each additional minute. If a 7 minute call costs $10, and a 4 minute call costs $6.40, find each rate.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Seven minute call\r
\n" ); document.write( "\n" ); document.write( "let the first minute cost be x\r
\n" ); document.write( "\n" ); document.write( "balance will be 10-x for the balance 6 minutes\r
\n" ); document.write( "\n" ); document.write( "rate /minute = 10-x / 6\r
\n" ); document.write( "\n" ); document.write( "SFour minute call\r
\n" ); document.write( "\n" ); document.write( "let the first minute cost be x\r
\n" ); document.write( "\n" ); document.write( "balance will be 6.4 -x for the balance 3 minutes\r
\n" ); document.write( "\n" ); document.write( "rate /minute = 6.4-x / 3\r
\n" ); document.write( "\n" ); document.write( "10-x / 6 =6.4-x / 3\r
\n" ); document.write( "\n" ); document.write( "30-3x= 38.4 - 6.4x\r
\n" ); document.write( "\n" ); document.write( "3x= 8.4
\n" ); document.write( "x=2.8\r
\n" ); document.write( "\n" ); document.write( "if x= 2.8 then the balance minutes will be charged at $ 1.2 /minute.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
\n" );