2-3x-5+9x=? Thank you to whoever gets the answer

What is the value of x in the following equation. -x ^3/2 = -27

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%

Find the zeros of each function. f(x) = x^2 + 5x - 6