Suppose that first-, second-, and third-place winners of a contest are to be selected from eight students who entered. in how many ways can the winners be chosen?

Classify the following triangle check all that apply

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then

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