document.write( "Question 672094: An overseas 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 the rate. \n" ); document.write( "
Algebra.Com's Answer #417804 by stanbon(75887)\"\" \"About 
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An overseas 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 the rate.
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\n" ); document.write( "Let fixed amount be \"x\" and additional rate be \"y\":
\n" ); document.write( "Equation:
\n" ); document.write( "x + 6y = 1000 cents
\n" ); document.write( "x + 3y = 640 cents
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\n" ); document.write( "Subtract and solve for \"y\":
\n" ); document.write( "3y = 360
\n" ); document.write( "y = $1.20 (added minutes rate)
\n" ); document.write( "----
\n" ); document.write( "solve for \"x\":
\n" ); document.write( "x + 3*120 = 640
\n" ); document.write( "x + 360 = 640
\n" ); document.write( "x = $2.80 (1st minute rate)
\n" ); document.write( "===================================
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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