<PRE><B>Question 1077421</B>
  A jogger begins her workout by jogging 7 miles to the park.
 She takes an alternate route home that takes an hour longer and is a total of 14 miles.
 If she jogs at the same pace what is her speed?
:
let s = the jogging speed
:
Write a time equation; time = dist/speed
14 mi time - 7 mi time = 1 hr
{{{14/s}}} - {{{7/s}}} = 1
multiply equation by s
14 - 7 = 1s
s = 7 mph is her speed
;
:
Confirm this find the actual time each way
14/7 = 2 hrs
7/7 = 1 hr
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dif: 1 hr  </PRE>