Can anyone help me plos? how many pounds of $2.4/lb trail mix should a grocer combine with 5 lb of 1.5/lb trail mix to get $1.9/lb trail mix?

Triangle xyz has vertices x(1,3), y(0,0)

If you could answer these your a life saver

Yesterday, george drank 1 small bottle and 2 large bottles, for a total of 1,372 grams. the day before , he drank 1 small bottle and 1 large bottle, for the total of 858 grams. how many grams does each bottle hold?