Why do they use (x-1) instead of x, why?

Someone . me. compound probability

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0

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?