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A few Statistic Problems

9. Find the z-value for an x-value of 121 for a normal distribution with a mean of 100 and a standard deviation of 16.9. 10. Find the probability of x being less than 69 for a normal...

x^2+4x=2x^2-x+6

Hi um I have been having trouble with this math problem. The directions said just to solve the equation.

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