PLEASE HELP 20 points Mary is solving the equation 3(x + 4) = 7x - 20. The first thing she does is rewrite the equation as shown below.

3x + 12 = 7x -20
Which property did Mary use to get from the original equation to her rewritten equation?
O associative property of multiplication
O commutative property of multiplication
o distributive property
O multiplicative property of equality

(co 3) the soup produced by a company has a salt level that is normally distributed with a mean of 5.4 grams and a standard deviation of 0.3 grams. the company takes readings of every 10th bar off the production line. the reading points are 5.8, 5.9, 4.9, 6.5, 5.0, 4.9, 6.2, 5.1, 5.7, 6.1. is the process in control or out of control and why? it is out of control as two of these data points are more than 2 standard deviations from the mean it is in control as the data points more than 2 standard deviations from the mean are far apart it is out of control as one of these data points is more than 3 standard deviations from the mean it is in control as the values jump above and below the mean