Arectangle has vertices at these coordinates. (1, 2) , (3, 2) , (1, −8) what are the coordinates of the fourth vertex of the rectangle? enter the coordinates in the boxes. ( , )

Two blends of tea are mixed to make a blend that will be sold at the fair. black tea sells for $2.20 per pound and orange pekoe tea sells for $3.00 per pound. how much of each should be used to obtain a 4lb blend selling for $2.50 per pound?