Describe some ways that the additive inverse of a number is important

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

Matt had 5 library books. he checked out 1 additional book every week without retuening any books. whats the matching equation

A10 inch cookie cake is divided into 8 slices. what is the area of 3 slices