Which set of side lengths could be used
to form a triangle?

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

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