If a point on circle p is selected at random, what is the probability that it lines on Arc AB?
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Could somebody me with this radical simplification?

Use the elimination method to solve the systems of equations.choose the correct ordered pair. 7x+4y=39

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%