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Linear Functions

SAT Math· difficulty 4/5

If f(x)=2x+3f(x) = 2x + 3 and g(x)=x−5g(x) = x - 5, what is f(g(4))f(g(4))?

  • A

    5

  • B

    −1-1

  • C

    7

  • D

    1

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Explanation

g(4)=−1g(4) = -1. f(−1)=2(−1)+3=1f(-1) = 2(-1) + 3 = 1.

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