Which equation represents a line which is parallel to y = 0?

If your teacher tells you to do questions 6 through 19 in your math book for homework, how many questions is that

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83

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