document.write( "Question 782844: Going 32 mph how long would it take me to go 128 miles \n" ); document.write( "

Algebra.Com's Answer #476556 by Edwin McCravy(20063) $\"\"$ $\"About$

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document.write( "Your teacher might want you to do it as a ratio and proportion\r\n" );
document.write( "problem:\r\n" );
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document.write( "32 mph means the ratio 32 miles to 1 hour\r\n" );
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document.write( "32 miles is to 1 hour as 128 is to  ?  hours.\r\n" );
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document.write( "Put an x where the \" ? \" is:\r\n" );
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document.write( "32 miles is to 1 hour as 128 is to x hours.\r\n" );
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document.write( "\"is to\" means \"over\" and \"as\" means \"equals\".\r\n" );
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document.write( "32 miles over 1 hour equals 128 miles over x hours.\r\n" );
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document.write( "It's not necessary to write in the units:\r\n" );
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document.write( "Cross-multiply:\r\n" );
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document.write( "32x = 128·1\r\n" );
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document.write( "32x = 128\r\n" );
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document.write( "Divide bth sides by 32.\r\n" );
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document.write( "  x = \r\n" );
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document.write( "  x = 4\r\n" );
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document.write( "So x hours is 4 hours.\r\n" );
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document.write( "Edwin

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