Let f(x)=5x and g(x)=2x + 1; find and simplify the following f(g(x))

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Let f(x)=5x and g(x)=2x + 1; find and simplify the following f(g(x))

f(g(x)) = 5(g(x))
f(g(x)) = 5(2x + 1)
f(g(x)) = 10x + 5