Describe how the graph of y=x2 can be transformed to the graph or the given question y=(x-2)2-15

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.

Write 17/20 as a decimal and as a percent.

How to do this , and can some one explain