document.write( "Question 351013: A motorboat at full throttle takes two hours
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document.write( "longer to travel 75 miles against the current than it takes to
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document.write( "travel the same distance with the current. If the rate of the
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document.write( "current is 5 mph, then what is the speed of the boat at full
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document.write( "throttle in still water?\r
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document.write( "I have been working on this problem and I can't figure it out. I have to provide detailed soultions step by step \n" );
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Algebra.Com's Answer #250911 by scott8148(6628)![]() ![]() You can put this solution on YOUR website! time = distance / rate ___ there is a 2 hr difference in the times\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "75 / (s - 5) = [75 / (s + 5)] + 2\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "multiplying by (s-5)(s+5) ___ 75(s+5) = 75(s-5) + 2(s-5)(s+5) ___ 75s + 375 = 75s - 375 + 2s^2 - 50\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "800 = 2s^2 \n" ); document.write( " |