What is the arithmetic mean of the following numbers?
1, 2, 4, 6, 4

Aphrase is shown read the phrase and give me the answer

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

Simplify this expression. 8x 16(x + y)