When solving the following system of equations, which variable would be the easiest to solve for? 2x + 3y = 17
4x + y = 19

the y in the first equation
the x in the second equation
the y in the second equation
the x in the first equation

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