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Five hundred gallons of 89octane gasoline is obtained by mixing 87octane gasoline with 92-octane gasoline.
I am struggling with how to form a system of equations. One equation represents the amount of final mixture required and the other represents the amount of 87- and 92octane gasoline in the final mixture. Let x and y represent the number of 87octane gallons and 92-octane gallons, respectively.
b) Use a graphing utility to graph the two equations in part (a). As the amount of 87-octane gasoline increases, how does the amount of 92-octane gasoline change?
c) How much of each type of gasoline is required to obtain the 500 gallons of 89octane gasoline.
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