An observer (o) spots a plane flying at a 35° angle to his horizontal line of sight. if the plane is flying at an altitude of 17,000 ft., what is the distance (x) from the plane (p) to the observer (o)?

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

State one method by which you can recognize a perfect square trinomial.

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