Write an equivalent expression for -2(6+7g)

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If f(x) = 3-2x and g(x) =1/x+5 to what is the value (f/g)(8)

Answer this question i need as soon as possible

Which function has an inverse that is also a function? a.{(-4,3), (-2, 7), (-1,0), (4, -3), (11, -7)} b.{(-4, 6), (-2, 2), (-1, 6), (4,2), (11, 2)} c.{(-4,5), (-2, 9), (-1,8), (4, 8), (11,4)} d.{(-4,4), (-2, -1), (-1,0), (4, 1), (11, 1)}