<PRE><B>Question 763567</B>
Car 1 = x
Car 2 = x + 6
Time = 1.5 hrs
Combined distance = 171 miles
x * 1.5 + (x + 6) * 1.5 = 171 miles
    1.5x + 1.5x + 9  =  171 miles
             3x + 9 = 171 miles
                  3x = 171 - 9
                  3x = 162
                   x = 54 mph
Car 1 = 54mph
Car 2 = 60mph
Proof:
 Speed * Time = Distance
 54mph * 1.5hrs = 81 miles
 60mph * 1.5hrs = 90 miles
          Total = 171 miles
Hope this helps.
:-)
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