document.write( "Question 251115: a man made a trip of 275 miles in 8 hours. before noon, he averaged 40mph , and after noon he averaged 25 pmh. at what time did he begin his trip ? \n" ); document.write( "
Algebra.Com's Answer #182856 by checkley77(12844)![]() ![]() ![]() You can put this solution on YOUR website! D=RT \n" ); document.write( "275=40X+30(8-X) \n" ); document.write( "275=40X+240-30X \n" ); document.write( "10X=275-240 \n" ); document.write( "10X=35 \n" ); document.write( "X=35/10 \n" ); document.write( "X=3.5 HOURS FOR THE 40 MPH TRIP. \n" ); document.write( "8-3.5=4.5 HOURS FOR THE 30 MPH TRIP. \n" ); document.write( "12:00-3:30=8:30 IS THE TIME OF THE BEGINNING OF HIS TRIP. \n" ); document.write( " |