Help with these questions please

Solve 3x-18=2y and 5x-6y=6 by elimination show work

Ade and abc are similar. which best explains why the slope of the line between points a and d is the same as the slope between points a and b?

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