Please help me 1,2,3 or 4 need ASAP.

Create and solve a linear equation that represents the model, where squares and triangles are shown evenly balanced on a balance beam. assume the weight of a square is 1 unit and the weight of a triangle is unknown.

What is the remainder when 2872 is divided by 76? a) 51 b) 57 c) 60 d) 63

What is the interquartile range of this data set? 2, 5, 9, 11, 18, 30, 42, 48, 55, 73, 81