The graph describes the journey of a train between two cities

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.

If chord ab is congruent to chord cd, then what must be true about ef and eg?

Solve the equation: x - 9 = -6 + 5 a. 21 b. 7 c. 14 d. 2