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4th grade math

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Hi!
This question says
Joe is thinking of o function machine.He says that the output is 12 if the input is 4.what are 2 rules that he could be thinking of for his function machine?( I would really be grateful if you helped me)
;)thanks

  • 4th grade math - ,

    Think of what you could do to 4 to turn it into 12

    - could multiply it by 3 ---> y = 3x
    -could add 8 to it -------> y = x+8
    -could double it then add 4 --- y = 2x + 4
    -could take 1/2 of it then add 10 --> y = (1/2)x + 10
    etc.

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