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7 September, 23:33

Evaluate 3x + 9 when x=4

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Answers (2)
  1. 8 September, 01:34
    0
    So you can use substitution for this problem which is plugging in the 4 for x:

    3 (4) + 9

    then you know that you can simplify it even more to

    12+9

    that can be simplified even more to

    21

    which is in simpliest form
  2. 8 September, 03:33
    0
    3x+9 is or equals to 21
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