A restaurant owner sells each plate of rice for 10 dollars plus an additional 40 dollars for the entrance. Mack goes to that restaurant and pays 100 dollars in total. How much plates of rice did he order?<span />
Maria ordered expensive pizza from a restaurant. The fee for delivery was $40 because her house was so far away and each pizza cost $10. At the end, she paid the delivery boy $100. With no tips or taxes, how many pizza boxes did she buy.
