Please help with my math.

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

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

Atriangle has an area of 72 square inches. if the base of the triangle has a length of 18 inches, what is the height of the triangle? use the formula for the area of a triangle: area = (base)(height) type a numerical answer in the space provided. do not include the units or spaces in your answer.