Heather can complete two problems in ten minutes, and when she started she had three problems done. Joel can complete three problems in fifteen minutes, and when he started he had two problems done. I

Heather can complete two problems in ten minutes, and when she started she had three problems done. Joel can complete three problems in fifteen minutes, and when he started he had two problems done. If you include the number of problems that were complete when they started, when will they have completed between 30 and 50 problems? Which inequality would you use to solve this problem, if x stands for the number of hours that have passed?