Solve the system using the elimination method. x+y−2z=5 −x+2y+z=2 2x+3y−z=9

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

Find the value of x. also give me an explanation so i can complete it to other questions as well, : )

The figure shows the front of a building in the shape of a trapezoid. what is the area of this trapezoid? 102 ft² 132 ft² 168 ft² 204 ft²