If x + 2y = 1, and 2x + y = 5, then x + y = ? A.1 B.2 C.3 D4 E.5

There is a line with slope 1/a going through the point (a, a²). find the equation of the line perpendicular to this line at this point. (don’t let this problem intimidate you! solve the problem as you would if i’d given you specific values. just use variables instead.)

Why did the ice arena get so hot after the big game (this is math related google it to find the paper

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie