Explain what role the negative sign plays in. -x^2=y

What are the vertical asymptotes of the function f(x) =5x+5/x2 + x-2

Find the value of the variable and the length of each secant segment.

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%