Question 1010306
Let {{{ m }}} = the total miles the bus travels
{{{ m - 250 }}} = miles over 250 that bus travels
----------------------
{{{ 90 + .4*( m - 250 ) = 500 }}}
{{{ 90 + .4m - 100 = 500 }}}
{{{ .4m = 510 }}}
{{{ m = 1275 }}}
They can travel 1,275 mi on the bus
---------------
check:
{{{ 1275 - 250 = 1025 }}} miles at 40 cents/mi
{{{ .4*1025 = 410 }}} dollars
{{{ 90 + 410 = 500 }}} dollars
OK