document.write( "Question 680852: jennifer walks 7 miles in the same time she can jog 12 miles. if her jogging speed is 8 mph faster than her walking speed, how fast does she walk? \n" ); document.write( "

Algebra.Com's Answer #422528 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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Jennifer walks 7 miles in the same time she can jog 12 miles.
\n" ); document.write( " if her jogging speed is 8 mph faster than her walking speed, how fast does she walk?
\n" ); document.write( ":
\n" ); document.write( "let w = the walking speed
\n" ); document.write( "then
\n" ); document.write( "(w+8) = the jogging speed
\n" ); document.write( ":
\n" ); document.write( "Write a time equation, time = dist/speed
\n" ); document.write( ":
\n" ); document.write( "jog time = walk time
\n" ); document.write( " $\"12%2F%28%28w%2B8%29%29\"$ = $\"7%2Fw\"$
\n" ); document.write( "Cross multiply
\n" ); document.write( "12w = 7(w+8)
\n" ); document.write( "12w = 7w + 56
\n" ); document.write( "12w - 7w = 56
\n" ); document.write( "5w = 56
\n" ); document.write( "w = 11.2 mph is the walking speed
\n" ); document.write( ":
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\n" ); document.write( "Sounds far-fetched, check by finding the time of each
\n" ); document.write( "7/11.2 = .625 hrs
\n" ); document.write( "12/19.2 = .625 hrs, seems to be right \n" ); document.write( "

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