Question 913310
 r A's mph, s B's mph
D = rt
10r - 10s = 5mi
8s -4r = 8mi
............
r - s = 1/2
<u>-r + 2s = 2</u>
s = 2.5 mph,B's mph  and r = 3mph, A's mph {{{r - 2.5 = .5}}}
And...checking
30mi - 25mi = 5mi