The cost of coffee is determined by the type of coffee beans that are mixed together. The cost of a local mix of Arabica and Rob usta beans is modeled by the equation below, where A = the pounds of Arabica and R = pounds of Robusta: 700A + 1200R = 1,000,000
If a mixture contains 1000 pounds of Arabica beans, how many pounds of Robusta beans should be in the mixture?
R = ________________ pounds
1 answer:
Substituting 1000 for A, we have 1200R+700,000=1,000,000. Subtracting 700,000 from both sides, we have 1200R=300,000. Dividing by 1200, we see that R=250.
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