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26 October, 10:25

Let f (x) = 3x + 5 and g (x) = - 4x + 7. Find (fog) (-4)

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  1. 26 October, 10:37
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    (fog) (x) = f (g (x))

    f (g (x)) = 3 (-4x+7) + 5

    f (g (-4)) = 3 (-4 (4) + 7) + 5=3 (-16+7) + 5=3 (-9) + 5=-27+5=-22

    (fog) (-4) = - 22
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