document.write( "Question 399547: Amanda can jog to work in 4/5 of an hour. When she rides her bike, it takes her 3/10 of an hour. If she rides 10 miles per hour faster than she jogs, how far away is her work?\r
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Algebra.Com's Answer #283082 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! Amanda can jog to work in 4/5 of an hour. \n" ); document.write( " When she rides her bike, it takes her 3/10 of an hour. \n" ); document.write( " If she rides 10 miles per hour faster than she jogs, how far away is her work? \n" ); document.write( ": \n" ); document.write( "We can use decimals: 4/5 = .8 hrs; 3/10 = .3 hrs \n" ); document.write( ": \n" ); document.write( "Find her speed jogging first \n" ); document.write( "let s = her speed jogging \n" ); document.write( "then \n" ); document.write( "(s+10) = her speed biking \n" ); document.write( ": \n" ); document.write( "Write a distance equation, dist = speed * time \n" ); document.write( "jog dist = bike dist \n" ); document.write( ".8s = .3(s+10) \n" ); document.write( ".8s = .3s + 3 \n" ); document.write( ".8s - .3s = 3 \n" ); document.write( ".5s = 3 \n" ); document.write( "s = 3/.5 \n" ); document.write( "s = 6 mph is her jogging speed. \n" ); document.write( "find the dist \n" ); document.write( ".8 * 6 = 4.8 mi to work \n" ); document.write( ": \n" ); document.write( "Check it by finding the dist on the bike (6+10 = 16 mph) \n" ); document.write( ".3 * 16 = 4.8 mi also \n" ); document.write( " |