3: for the following set of simultaneous equations: (a) form the augmented coefficient matrix (b) solve the equations by gaussian elimination x1 +2x2 3x3-5 3x1-x2 + 2x3 = 8 4x1 6x2 -4x3-2

Will make ! for correct answer the dot plot below shows the number of toys 21 shops sold in an hour.is the median or the mean a better center for this data and why? a. median; because the data is not symmetric and there are outliersb. median; because the data is symmetric and there are no outliersc. mean; because the data is symmetric and there are no outliersd. mean; because the data is skewed and there are outliers