The variable z is directly proportional to x. when x is 3, z has the value 18. what is the value of z when x=13

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F(x)= 4x g(x) =x-1 what is f(x) divided by g(x)

The weight v of an object on venus varies directly with its weight e on earth. a person weighing 120 lb on earth would weigh 106 lb on venus. how much would a person weighing 150 lb on earth weigh on venus?