document.write( "Question 610894: After a sailboat had been on the water for 3 h, a change in the wind direction reduced the average speed of the boat by 7 mph. The entire distance sailed was 77 mi. The total time spent sailing was 7 h. How far did the sailboat travel in the first 3 h? \n" ); document.write( "
Algebra.Com's Answer #384913 by ankor@dixie-net.com(22740)\"\" \"About 
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After a sailboat had been on the water for 3 h, a change in the wind direction reduced the average speed of the boat by 7 mph.
\n" ); document.write( " The entire distance sailed was 77 mi. The total time spent sailing was 7 h.
\n" ); document.write( " How far did the sailboat travel in the first 3 h?
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\n" ); document.write( "let s = original speed before the wind change
\n" ); document.write( "then
\n" ); document.write( "(s-7) = reduced speed
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\n" ); document.write( "If the first part was 3 hrs, the 2nd part would be 7-3 = 4 hrs
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\n" ); document.write( "Write a distance equation; dist = speed * time
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\n" ); document.write( "3s + 4(s-7) = 77
\n" ); document.write( "3s + 4s - 28 = 77
\n" ); document.write( "7s = 77 + 28
\n" ); document.write( "7s = 105
\n" ); document.write( "s = 105/7
\n" ); document.write( "s = 15 mph for the 1st 3 hrs
\n" ); document.write( "then
\n" ); document.write( "3 * 15 = 45 mi traveled in the 1st three hrs
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\n" ); document.write( "Check this, find the total dist
\n" ); document.write( "45 + 4(8) = 77 \n" ); document.write( "
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