Question 136904
Nope.  You had it set up correctly, but you set it up so that t represented STEVE's travel time, which is, in fact 1 hour.  Dave's travel time, according to your equation, is t - 1/2, so 1 - 1/2 = 1/2.


If you wanted Dave's travel time directly, you could have set up the equation like this:


{{{50(t+1/2)+60t=80}}}
{{{50t+25+60t=80}}}
{{{110t=55}}}
{{{t=1/2}}}