By factoring the expression 12x+6x-6 find the zero of the quadratic function this expression defines

Plz ( true - false) all triangles have interior angles whose measure sum to 90.

An observer(o) spots a plane(p) taking off from a local airport and flying at a 29 degree angle horizontal to her line of sight and located directly above a tower(t). the observer also notices a bird circling directly above her. if the distance from the plane(p) to the tower(t) is 6,000ft., how far is the bird(b) from the plane(p).

Which of these figures must be a rectangle?