document.write( "Question 123524: Hi, I would really appriciate your help with this problem \r
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document.write( "An express bus travels 320 miles in the same amount of time that a car travels 280 miles. The rate of the car is 8 mph less that the rate of the bus. Find the rate of the bus. \n" );
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Algebra.Com's Answer #90613 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! An express bus travels 320 miles in the same amount of time that a car travels 280 miles. The rate of the car is 8 mph less that the rate of the bus. Find the rate of the bus. \n" ); document.write( ": \n" ); document.write( "Let s = the rate of the bus \n" ); document.write( "then \n" ); document.write( "(s-8) = rate of the car \n" ); document.write( ": \n" ); document.write( "Write a time equation: Time = \n" ); document.write( ": \n" ); document.write( "Bus time = Car time \n" ); document.write( " \n" ); document.write( "Cross multiply: \n" ); document.write( ": \n" ); document.write( "320(s-8) = 280s \n" ); document.write( ": \n" ); document.write( "320s - 2560 = 285s \n" ); document.write( ": \n" ); document.write( "320s - 280s = +2560 \n" ); document.write( ": \n" ); document.write( "40s = 2560 \n" ); document.write( "s = \n" ); document.write( "s = 64 mph is the bus \n" ); document.write( ": \n" ); document.write( ": \n" ); document.write( "Check our solution by find the times (are they equal) \n" ); document.write( "Car speed 64 - 8 = 56 mph \n" ); document.write( "320/64 = 5 hrs \n" ); document.write( "280/56 = 5 hrs confirms our solution \n" ); document.write( " |