How many pounds of Brazilian coffee costing $ 6 per pound must be mixed with 27 lbs of Columbian coffee costing $ 4 per pound to
1 answer:
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I might be wrong in this one but I am certain to the right Is definitely -3. If I get it wrong can you tell me what I got wrong to improve from my mistakes.
Answer:
a = 2, b = 3.5
Step-by-step explanation:
Expanding using Binomial expansion, we have that:
=
We have that the coefficients of the first two terms are 128 and -224.
For the first term:
=>
=>
For the second term:
Therefore, a = 2, b = 3.5