Mathematics, 29.01.2020 16:56, sincere21

What is the value of f(? 3) +f(7) f(-3) +f(7) when f(x)=? 3x+9 f(x)=-3x+9 ? 18 6 -6 -12

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What is the value of f(? 3) +f(7) f(-3) +f(7) when f(x)=? 3x+9 f(x)=-3x+9 ? 18 6 -6 -12...