Simplify each expression
-21v^6 / -6v^8 v≠0

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

I’m really confused and need to learn this

Petes dog weighed 30 pounds it then lost 16% of it's weight how much did pete lose