Question 522953
t = d / r


(91 / s) + [21 / (s - 5)] = 5


multiplying by s(s-5) the LCD ___ 91s - 455 + 21s = 5s^2 - 25s


0 = 5s^2 - 137s + 455


use quadratic formula to find s ___ there will be 2 solutions, but only one will check