document.write( "Question 1092487: Max Points: 5.0\r
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document.write( "Select one of the options below and create a linear equation to represent the monthly bill. When will the plans cost the same? Explain when each plan is a better option.\r
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document.write( "Option 1: Plan A $39.99 for 200 min and $1.25 for each min after. Plan B $29.99 for 200 min and $1.50 for each min after.\r
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document.write( "Option 2: Plan A $25.75 plus $.75 per min. Plan B $20.99 plus $1.00 per min\r
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document.write( "Option 3: Plan A $39.99 plus $1.25 per min. Plan B $25.99 plus $1.75 per min \n" );
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Algebra.Com's Answer #707123 by Boreal(15235) You can put this solution on YOUR website! Look at the options for 500 minutes \n" ); document.write( "Option 1 \n" ); document.write( "A: 39.99+1.25(300)=39.99+375=$414.99 \n" ); document.write( "B:29.99+1.50(300)=29.99+450=$479.99; plan B is cheaper if one doesn't talk as much. \n" ); document.write( "Using 40 and 30 for the base cost, 40+1.25x=30+1.5x \n" ); document.write( "10=0.25x, x=40 minutes, where the two are equal. So if fewer than 40 minutes, B is better. \n" ); document.write( "=================== \n" ); document.write( "Option 2 \n" ); document.write( "A: 25.75 +$375=$400.25 \n" ); document.write( "B:20.99+500=$520.29. \n" ); document.write( "25.75+.75x=20.99+x \n" ); document.write( "4.76=0.25x \n" ); document.write( "x=19.04 minutes, so if 19 or fewer minutes, use B. \n" ); document.write( "================== \n" ); document.write( "Option 3 \n" ); document.write( "A: 39.99+1.25x is the equation (like the others above, where x=minutes) at 500 minutes, it is 39.99+625=$664.99. \n" ); document.write( "B: 25.99+1.75x, and at 500 minutes it is $900.99. \n" ); document.write( "set the two equal \n" ); document.write( "39.99+1.25x=25.99+1.75x \n" ); document.write( "14=0.5x \n" ); document.write( "x=28 minutes. For times fewer than 28 minutes, B is better. \n" ); document.write( " |