What role does sentence 3 play in the development of the key event in this paragraph?

The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length

Iwill give brainliest. suppose tommy walks from his home at (0, 0) to the mall at (0, 5), and then walks to a movie theater at (6, 5). after leaving the theater tommy walks to the store at (6, 0) before returning home. if each grid square represents one block, how many blocks does he walk?

Write as a product of two polynomials. 2(3–b)+5(b–3)^2