50% of all the cakes jenny baked that week were party cakes,1/5 were fruit cakes and the remainder were sponge cakes. what percentage of cakes were sponge cakes?

Someone answer this asap for the length, in feet, of a rectangular rug is represented by the expression 5x² + 2x. the width, in feet, is represented by the expression 3x². which expression represents the perimeter, in feet, of the rug? a. 8x² + 2x b. 8x² + 4x c. 16x² + 2x d. 16x² + 4x