If y varies directly with x and Y equals 12 when X equals four what is the constant of proportionality

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%

What is the solution to this system of equations? y= 2x - 3.5 x - 2y = -14

If i had 1234 apples and 1 banana what is the total amount