Can anyone simplify

6d - 4d

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

Which of the following is a justification used while proving the similarity of triangles lom and mon

1. are the corresponding angles congruent 2. find the ratios of the corresponding sides 3. is triangle jkl congruent to triangle rst? if so what is the scale factor