Algebra: Solve it: 7y - 2y + 3y?

Questions

most candles on a cake - chefs at the al bustan rotana hotel made a cake with ____ candles?

in 1998, coca-cola sold more than 683 million?

joan priednieks somerset, uk, grew a celery plant that measured ____ tall in 1998?

most expensive house built hearst castle at san simeon, california, usa was built between 1922-39 for a total cost of more than us$?

ray-ban sunglasses sold ________ units worldwide in 1998?