Need math !

which expression is equivalent to the given expression?
5x−2

a) 2−5x
b) 2x−2+3x
c) 3−5+2x
d) 5x−2x

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