Whoever gets it right gets brainliest

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Which two undefined geometric terms always describe figures with no beginning or end?

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