I think y’all know what to do. Constant rate of change.

The sixth grade art students are making a mosaic using tiles in the shape of right triangles.each tile has leg measures of 3 centimeters and 5 centimeters.i f there are 200 tiles in the mosaic what is the area of the mosaic.

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

1.based of the diagrams what is the the value of x? 2.how would you verify your answer for x