Is it impossible for a trapezoid to have parallel sides that are the same length

We have 339 ounces of jam to be divided up equally for 12 people how muny ounces will each person get

y=2x−1 5x−4y=1 is (1,1)(1,1) a solution of the system?

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).