Reagan has 3 books in her backpack. Two of the books each have a mass
of 0.45 kilogram. The mass of the
third book is 200 grams greater than
the combined mass of the other two
books. What is the mass of the third
book in Reagan's backpack?

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?