Choose a variable to isolate and what it is equal to in the system of equations below? 4x=y+4
4y=3x-1
(a) 4y=4x-1
(b) y=4x-4
(c) y=4x+3
(d) 2y=x-3

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