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What is the electric potential at point x? What is the resistance of a device rated 30 watts @ 120 volts DC?

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A +0.605 mC charge is 0.113 m from point x, a -0.398 mC charge is 0.174 m from point x, and a -0.211 mC charge is 0.251 m from point x.
What is the electric potential at point x?

What is the resistance of a device rated 30 watts @ 120 volts DC?

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A +0.605 mC charge is 0.113 m from point x, a -0.398 mC ...

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With full formulas and explanations, the problem is solved. The electric potential at a point is determined.

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