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15 April, 15:08

Given the function ƒ (x) = 3x + 5, find ƒ (4) and x such that ƒ (x) = 38.

Select one:

A. 17; 11

B. 20; 13

C. 12; 15

D. 24; 9

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Answers (1)
  1. 15 April, 15:13
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    A. 17, 11

    f (4) = 3 (4) + 5

    =17

    f (x) = 38

    38 = 3x + 5

    38 - 5 = 3x

    33 = 3x

    x = 11
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