Se the given length and area of a rectangle to express the width algebraically.
length is x + 5, area is 2x2 + 9x − 5

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%