The mean of the data set(9,5,y,2,x) is twice the data set(8,x,4,1,3).what is (y-x)

What is the value of y? round to the nearest tenth

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?

Luke started a weight-loss program. the first week, he lost x pounds. the second week, he lost pounds less than times the pounds he lost the first week. the third week, he lost 1 pound more than of the pounds he lost the first week. liam started a weight-loss program when luke did. the first week, he lost 1 pound less than times the pounds luke lost the first week. the second week, he lost 4 pounds less than times the pounds luke lost the first week. the third week, he lost pound more than times the pounds luke lost the first week.