Question 669835
A car went 175 mph in 3 hours one way and 4.5 hours on the way back.
 What is the average speed?
:
let a = the average speed for the round trip; speed = dist/time
:
a = {{{2(175)/((3+4.5))}}} = {{{350/7.5}}} = 46{{{1/3}}} mph