How many solutions does the system have?

x + y = 5
x + y = 6

Given the box plot, will the mean or the median provide a better description of the center? box plot with min at 10.5, q1 at 11.5, median at 12.5, q3 at 13.5, max at 15

Me, the vertices of quadrilateral coat are c(2,0), o(7,0), a(7,2) and t(2,2). prove that coat is a rectangle.

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!