Question

PLEASE HELP ME!

Answer 1

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given:

 = cost of Brazilian coffee in mixture

 = cost of Venezuelan coffee in mixture

 = cost of mixture

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Now I can rite these equations:

(1) 

(2) 

Multiply both sides of (2) by  and

subtract from (1)

(1) 

(2) 

and, since

288 kg of Brazilian coffee and 96 kg of Venezuelan coffee are needed