10. Maria decreases her time by 5 seconds each day she runs her 400 meter track. Using this rate, how much will she decrease her time by on her 7th day? *

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