Mark think of a number mark doubles it and add 2.9 to get answer of 30.6 form an equation with x from the information

Solve 3x-18=2y and 5x-6y=6 by elimination show work

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%

Line wx is parallel to line yz. if m