What is 48 - (-31) Pre-Algebra

There are 4 cups in a quart and 4 quarts in a ganon.jug of water? . how many cups are in a 5-gallon jug of water?

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.

David leaves his house to go to school. he walks 200 meters west and 300 meters north. how far is david from his original starting point?