Two planes leave an airport at the same? time, one flying? east, the other flying west. the eastbound plane travels 90 mph slower. they are 3480 mi apart after 4hr. find the speed of each plane.

2x + 2(x-90) = 3480

2x + 2x - 180 = 3480

4x = 3660

x = 915 mph Plane 1 westbound

915-90 = 825 mph plane 2 eastbound

answer: evaluate the objective function at each vertex to determine which - and -values, if any, maximize or minimize the function. example: find the minimum value and maximum value of the objective function f ( x , y ) = 4 x + 5 y , subject to the following constraints

on monday rodney ate 1/4th of the sandwich = 3/12

on tuesday he ate 1/3rd of the sandwich = 4/12

therefore in total he has eaten = 3/12 + 4/12 = 7/12

thus we can say that he has eaten 7/12 of the sandwich on monday and tuesday alltogether.

happy to

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