Find the area of the shaded region: what are the steps to solve this? you!

The difference of 2 numbers is 21 and the quotient of the equation is 4 then what are the two numbers?

George has seven boxes of five pencils. giulio three boxes of eight pencils. one of the boys arranges all his pencils equally into two groups. was this george or giulio how many are in each group explain

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.