Mary and amy had a total of 20 yards of material from which to make costumes. mary used three times more material to make her costume than amy used, and 2 yards of material was not used. how many yards of material did amy use for her costume?

Iwill give brainliest. give accurate answer, . 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?