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The function f(x) is equal to the square of a number lessened by 5. Th

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The function f(x) is equal to the square of a number lessened by 5. Th  [#permalink]

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New post 27 Mar 2019, 02:02
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A
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D
E

Difficulty:

  5% (low)

Question Stats:

100% (00:49) correct 0% (00:00) wrong based on 14 sessions

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The function f(x) is equal to the square of a number lessened by 5. The function g(x) is equal to a number tripled. What is f(g(2)) ?

a. 4

b. 7

c. 13

d. 22

e. 31


Source : Barron's GMAT

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Re: The function f(x) is equal to the square of a number lessened by 5. Th  [#permalink]

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New post 27 Mar 2019, 10:10
Let the number be x.
Now, f(x) = x^2-5
g(x) = 3x.

f(g(2)) = g(2)^2-5
g(2) = 3*2 = 6.
f(g(2)) = 36-5 = 31

E is the answer
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Re: The function f(x) is equal to the square of a number lessened by 5. Th   [#permalink] 27 Mar 2019, 10:10
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