Question 190270
{{{d=rt}}} Start with the distance rate time equation



{{{200=r(x+3)}}} Plug in {{{d=200}}} and {{{t=x+3}}}



{{{200/(x+3)=r}}} Divide both sides by {{{x+3}}}.



{{{r=200/(x+3)}}} Rearrange the equation



So the rate is {{{200/(x+3)}}} feet per second