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

Answer 1

700(1000)+1200R=1000000

Answer 2

700000+1200R=1000000

Answer 3

1200r=300000

Answer 4

divide by 1200

Answer 5

250 pounds

Answer 6

Do you understand it how i got that formula and did the steps?

Answer 7

700A+1200R=1,000,000

why the cost should be fixed at 1,000,000 is beyond me, but anyway that is what it says
then it says A=1000 so now the equation is
700×1000+1200R=1,000,000
or
700,000+1200R=1,000,000
which i would solve in two steps
1) subtract 7000,000 to get
1200R=300,000

2) then divide by 1200 to get
R=250