Please help with this question

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%

Which value of m will create a system of parallel lines with no solution? y= mx - 6 8x - 4y = 12

Which shows the graph of the solution set of 3y – 2x > –18?