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 Robusta 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?

Question

Clark Greer

Mathematics

17 December, 18:50

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 Robusta 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?

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Answers (1)

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Elvis · Answer 1

700a+1200r=1000000 (then plug in the a)

700 (1000) + 1200r=1000000 (simplify)

700000+1200r=1000000 (subtract 700000 from both sides)

1200r=300000 (divide by 1200 on both sides)

r=250

250 pounds