(X^-3xy^3)^-7 pleas help on khan academy what is equal answer

Acircular hot tub located near the middle of a rectangular patio has a diameter of 48 inches. the patio measures 11 feet by 6 feet. what is the area of the patio that is not covered by the hot tub?

Which equation represents a line that is parallel to the line whose equation is 3x-2y=7( show all work)

Rhombus adef is inscribed into a triangle abc so that they share angle a and the vertex e lies on the side bc . what is the length of the side of the rhombus if ab=c, and ac=b.