<PRE><B>Question 749181</B>
at 6 a.m. Nancy left Chicago and headed south at 20 miles per hour.
rate = 20 mph ; time = x hrs
distance = 20x miles where x is time after 6 a.m.
--------------------------------------------------------- 
At 8 a.m. Karen left the same place headed south on the same road. IF karen was 50 miles ahead by 1 p.m. on the same day, what was her speed?
distance = 20x+50 miles; time = 5 hrs ; rate = d/t = 4x+10 mph
-----
Since x = time from 6am to 1pm = 7 hrs
----
Karen speed = 4x+10 = 4*7+10 = 38 mph
-------------------
Cheers,
Stan H.
===================

</PRE>