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What is the value of 3b-a when a = 3 and b = 4?

A.18
B.9
C.3
D.-3

1 answer

Substituting the given values into the expression 3b-a, we get 3(4)-3 = 12-3 = 9.
Thus, the value of 3b-a when a = 3 and b = 4 is 9.
Therefore, the correct answer is B. 9.