What is the discontinuity of the function f(x) = (x^2 - 4x -12) / x+2?

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

Liz is shipping a package to her friend.the maximum weight of a medium flat-rate box is 20 pounds,including the box which weighs 6 ounces.write and solve an inequality to describe the possible weight ,w, of the contents that liz will ship to her friend if she must use a medium flat-rate box.

X+y=-4 x-y=2 use elimination with adding and subtraction