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

Use the formula they gave you and the fact that there is1000 pounds of Arabica beans to solve for R. Like this:

Answer 2

can you show me how to slove it

Answer 3

700(1000) + 1200R = 1,000,000
700000 + 1200R = 1,000,000
1200R = 300,000
R = 250

Answer 4

thanks

Answer 5

you bet!