Verified Answer :

charstar
  1. I don't what it means by models sorry.
    2.
    a) gcf of 4d and 12e is 4
        4(d+3)
    b) gcf of 18x and 30y is 6
        6(3x+5y)
    c) gcf of 21a and 28y is 7
        7(3a+4y)
    d) gcf of 24f and 56g is 8
        8(3f+7g)

    Hope this helps :)

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