Mathematics

Question

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?

R = ________________ pounds

Numerical Answers Expected!

2 Answer

  • A=1000 so now the equation is

    700(1000)+1200R=1,000,000
    700,000+1200R=1,000,000
     
    subtract 7000,000 to get:1200R=300,000

    then divide by 
    1200 to get R=250


  • 700A + 1200R = 1,000,000
    700(1000) + 1200R = 1,000,000
    700,000 + 1200R = 1,000,000
    1200R = 300,000
    R = 250
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