Question 903836
How much of a head start does the small
plane get?
{{{ d[1] = 270*1.5 }}}
{{{ d[1] = 405 }}}
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Start a stop watch when the 747 leaves
Let {{{ t }}} = the time on the stop watch
when both planes arrive in Portland
{{{ 810 }}} mi = the distance the 747 travels
during time {{{ t }}} 
Let {{{ s }}} = average speed of the 747
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747's equation:
(1) {{{ 810 = s*t }}}
Small plane's equation:
{{{ 810 - 405 = 270t }}}
(2) {{{ 405 = 270t }}}
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(2) {{{ t = 1.5 }}}
and
(1) {{{ 810 = s*t }}}
(1) {{{ s = 810 / 1.5 }}}
(1) {{{ s = 540 }}}
The average speed of the 747 is 540 mi/hr