Maria, Boris, and Chang served a total of 81 orders Monday at the school cafeteria. Boris served 2 times as many orders as Chang. Chang served 9 fewer orders than Maria. How many orders did they each serve?

If you roll two fair dice (one black die and one white die), in how many ways can you obtain a 4 on at least one die?

Aplane flies around trip to philadelphia it flies to philadelphia at 220 miles per hour and back home with a tailwind at 280 miles per hour if the total trip takes 6.5 hours how many miles does the plane fly round trip

The first floor of marcus’ house is 1,440 square feet. he will cover 1,033 square feet with wood and the rest with tile. a box of tiles will cover 11 square feet. how many boxes of tile does marcus need to buy to cover the floor?