Consider the following systems of linear equations ax = b. manually solve the systems and classify them based on the existence/type of solution. a) 2x - y+z=1 x+y-z= 2 3x - y+z=0 b) – xy + x2 +3x3 =-2 x2 + 2x2 = 4 c) x – 2y =-1 2x + 3y = 7 d) x-2y=-1 -x +2y = 7

The box plots show the distributions of the numbers of words per line in an essay printed in two different fonts.which measure of center would be best to compare the data sets? the median is the best measure because both distributions are left-skewed.the mean is the best measure because both distributions are left-skewed.the median is the best measure because both distributions are symmetric.the mean is the best measure because both distributions are symmetric