What are three equivalent fractions of 4/9?

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

Cd is the perpendicular bisector of both xy and st, and cy=20. find xy.

Multiply and simplify 2x^2 y^3 z^2 · 4xy^4 x^2