A research group using hospital records developed an approximate mathematical model relating systolic blood pressure and age. P(x) = 50 + 25 In (x + 2) P(x) is pressure measured in millimeters of mercury and x is age in years. 0≤x≤65 The rate of change of pressure at the end of 10 years is mm/year. (Type an integer or decimal rounded to the nearest hundredth as needed.)

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A: We solve the system of equation by Gauss Jordan elimination method.

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