pre cal

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please help don't understand this...Assume f(x) = 2x + 8 and g(x) = 5. What is the value of (f + g)(3)?

  • pre cal -

    (f+g)(x) = f(x) + g(x)
    = (2x+8) + (5) = 2x+13
    (f+g)(3) = 2*3 + 13 = 19

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