Which set of expressions are not equivalent? 4c - 2c - 3 and 2c - 3 (9c + 12) - c - 3 and 8c + 9 5c - 2c + 8 - 4 and 3c + 4 0.5 + (10c + 8) and 5c - 4

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.

Which basic geometric term has no width, no length, and no thickness? line b. point c. angle d. plane

Don't know how to find x given these segment lengths