What was the primary government during the Middle Ages? barbarians
church
kings
serfs

Kings

Explanation:

Most governments in the Middle Ages were Kings, serfs were the peasants were the farmers and workers of the Church was an 'influencer' to who became King,and barbarians were widely wiped out by this time of history.

answer: this problem has only trivial solutions, with all points on the same line. x=5 or x=7/5.

step-by-step explanation:

there are three triangles, and three unknowns: x, y=length of middle segment, and z=cos(angles marked with red arc).

we need

and law of cosines,

the three equations are

see attached image for solution.

b) race riots in several cities