Pensé un número, le saque la mitad y luego le reste 15,con lo que obtuve 125. ¿Cuál es el número que pensé?

The area of a rectangle is 54x^9y^8 square yards.if the length of the rectangle is 6x^3y^4 yards,which expression represents the width of the rectangle in yards

Me, prove a quadrilateral with vertices g(1,-1), h(5,1), i(4,3) and j(0,1) is a rectangle using the parallelogram method and a rectangle method.

9/10 divide by -3/15 as a mixed number