## anonymous one year ago 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

1. anonymous

2. anonymous

$700\times 1,000+1200R=1,000,000$ solve for $$R$$

3. anonymous

i dont get that its the same thing im trying to figure out

4. anonymous

A is arabic beans with a quantity of 1000 which is given

5. anonymous

sorry confusing yes getting it no

6. anonymous

well you got an equation with 2 unknowns R and A right?

7. anonymous

yes

8. anonymous

but in your question A is given

9. anonymous

that is 1000

10. anonymous

ok but r is the confusing part

11. anonymous

R becomes then your only unknown

12. anonymous

so you fill in your A 700*1000 +1200R = 1 000 000

13. anonymous

700 000+ 1200R = 1 000 000

14. anonymous

1200R = 300 000

15. anonymous

R= 300 000/1200

16. anonymous

R=250

17. anonymous

thx

18. anonymous

np