Which of the following shows that polynomials are closed under subtraction when polynomial 4x − 3 is subtracted from 2x2  − 5x + 1?

What is the relationship between the wavelength of a wave and it's energy?

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.