What are the domain and range of the function?

Write the sentence as an equation. 6 fewer than the quantity 140 times j equals 104

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.

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