Help me plz it’s important

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.

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

Use the data on the dot plot to answer the question. how many people read for more than three hours last week? i'm on a unit test review