i hate word problems don't you?
distance is rate times time, so \[D=4\times R=4.5\times( R-5)\]
we can solve \[4R=4.5(R-5)\] for R
wait 1 sec...
R = 45 rite?
yeah! but we are not done
i had \(R\) as the rate of the faster car, so the rate of the slower car is \(45-5=40\)
right! Ty Satellite!