gmat数学题 one kilogram of a certain coffee blend co
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gmat数学题 one kilogram of a certain coffee blend co
gmat数学题
one kilogram of a certain coffee blend consists of x kilogram of type 1coffee and y kilogram of type2coffee .the cost of the blend isC dollars per kilogram,where C=6.5x+8.5y.Is x0.15
(2)C>=7.30
answer is B
gmat数学题
one kilogram of a certain coffee blend consists of x kilogram of type 1coffee and y kilogram of type2coffee .the cost of the blend isC dollars per kilogram,where C=6.5x+8.5y.Is x0.15
(2)C>=7.30
answer is B
(1) y>0.15.因为x+y=1,可以得到x=7.30.即6.5x+8.5y>=7.30,将y=1-x代人,得到x
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