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: (2 points)

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?

Answer 1

Hello welcome to QuestionCove c:
So if A= pounds of Arabica beans then A=1,000
So you would do
700(1,000)+1,200R=1,000,000
You would then multiply the 700(1000) getting
700,000+1,200R=1,000,000
Next step would be to subtract 700,000 from both sides
700,000-700,000+1,200R=1,000,000-700,000
Which leads to
1,200R=300,000
You would then divide both sides by 1,200 to find out what R is
R=250
So 250 pounds of Robusta beans should be in the mixture c: