Short Answer
A 14 kg sample of a certain alloy (mixture of metals) contains 5 kg of tin and 9 kg of copper. A chemist decides to study the properties of the alloy as its percentage of tin is varied. Suppose x represents the quantity of tin, in kg, the chemist adds to the sample. Let 
represent the fraction of the mixture's mass composed of tin--that is, the ratio of the tin's mass to the mixture's total mass. A negative value of x represents a quantity of tin removed from the original 14 kg sample.
= ______ kg. Round to 2 decimal places.
Correct Answer:
Verified
Correct Answer:
Verified
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