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21-10-2018
Mathematics

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Use the functions f(x) and g(x) to answer the question

f(x) =4x - 5; g(x)= x+3

A. 4x - 2
B. 4x + 7
C. 4x+ 12
D.5x - 2

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Аноним Аноним

21-10-2018

The answer is B. 4x + 7

The function is fg(x), so for the equation, it will be fg(x) : 4g(x) - 5, then substitute the equation of g(x) into fg(x) and you will get 4 (x + 3) - 5, then solve it by expanding

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