Question 706345
d = rt


d = r*8


d = 8r


So he travels 8r miles


The trucker must travel at least 375 miles, so this means {{{8r >= 375}}}. Flip things to get {{{375 <= 8r}}}


"and company regulations don't allow him to exceed 450 in one 8-hour shift.", so {{{8r <= 450}}}


Combine {{{375 <= 8r}}} and {{{8r <= 450}}} to get the final answer: {{{375 <= 8r <= 450}}}