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Consider the functions f(x) = 3x^2 and g(x) = −2x − 5. What is the value of f[g(−4)]?

0 votes
Answer choices: 1) 9 2) -31 3) 27 4)3
asked Nov 19, 2013 in ALGEBRA 1 by chrisgirl Apprentice

1 Answer

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Given functions f(x) = 3x^2

g(x) = -2x-5

f(g(x)) = f(-2x-5)

= 3(-2x-5)^2

Now f(g(-4) = 3(-2(-4)-5)^2

= 3(8-5)^2

= 3(3)^2

= 3*9

= 27

Option 3 is correct answer.

 

answered Dec 19, 2013 by ashokavf Scholar

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