Explain it to me how to do this i am begging

True or false? a circle could be circumscribed about the quadrilateral below.

2. explain in words how you plot the point (4, −2) in a rectangular coordinate system.

Campus rentals rents 2 and 3 bedrooms apartments for $700 ans $900 a month respectively. last month they had six vacant apartments and reported $4600 in lost rent. how many of each type of apartment were vacant?