Jason has 12 quarters. For every quarter, Jason also has a game token worth c cents. Jason knows the total value of his quarters and tokens is 420 cents. Which equation can Jason use to determine the value of the tokens?

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap