Question 1052957
Let {{{ s }}} = the slowest speed she can drive in mi/hr
{{{ 275/s }}} = her time in hrs
You want this time to be less than or equal to {{{ 5.5 }}} hrs
{{{ 275/s <= 5.5 }}}
{{{ 275 <= 5.5s }}}
{{{ 50 <= s }}}
Write the other way around
{{{ s >= 50 }}}
So, she has to travel at least 50 mi/hr 
average speed to arrive on time
Opps, sorry, I solved it.