Mathematics, 05.12.2021 02:20 faithtunison

Circle P has a radius of 5cm. Point Q lies on circle P, and the equation of PQ is y=2/5x+3. Which equation could be the equation of a line tangent to circle P at point Q? I know that 5x + 2y = 7 is the correct answer, but I would like to know why it is correct, can someone please explain?

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Circle P has a radius of 5cm. Point Q lies on circle P, and the equation of PQ is y=2/5x+3. Which eq...

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