If the diameter of the circle is above 20mm what is the area

What will the graph look like for a system of equations that has no solution? a. the lines will be perpendicular. b. the lines will cross at one point. c. both equations will form the same line. d. the lines will be parallel.

If 2(a^2+b^2)=(a+b)^2 then, > a+b=0, > ab=0, > a=b, > 2a=b

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out