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Mathematics 8 Online
OpenStudy (anonymous):

Let f(x) = -4x + 7 and g(x) = 10x - 6, find f(g(x)). -40x + 24 -40x + 31 -40x + 64 -40x + 70

OpenStudy (dan815):

f(x)=-4x + 7 f(g(x)=-4(10x - 6) + 7

OpenStudy (dan815):

expand and simplify

OpenStudy (dan815):

where you previously saw an x, it gets replaced by the whole expression g(x)

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