Idon't know how to find x. can someone explain.

  x° = 109°

Step-by-step explanation:

x° is a "corresponding angle" to either of the upper left or lower right interior angles of the parallelogram. (The lines marked with a single arrow are parallel, as are the lines marked with a double arrow.)

Either of those angles is supplementary to the one marked 71°, so x° and all corresponding angles are 180° -71° = 109°.

step-by-step explanation:

the options are kind of confusing. i can tell you what i see going on here when i look at the graph.

the class and exam medians are closely related, and it looks like the low outlier on the exam did pull the median lower. [tex][/tex]

m∠a is 90°

m∠b is 40°