b) A book seller purchased 100 story books at Rs 135 each. She donated 10 books to a school library. If she sold remaining books at 2% loss, find the selling price of each book.

Frank has a devised a formula for his catering business that calculates the number of meatballs he needs to prepare. the formula is m=4a+2c, where c=number of children; m=number of meatballs; a=number of adults. how many meatballs are required for a party of 10 adults and 5 children?

8litres of paint can cover 129.6 m². how much paint is required to paint an area of 243m²?

What is the value of x? enter your answer in the box.