Dave owns 15 shares of abc mining stock on monday the value of each share rose two dollars but on tuesday the value fell 5 dollars what is the change in the value of dave’s shares

Find the area of a parallelogram with base 15 yards and height 21 2/3

Could somebody me with this radical simplification?

How many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.) how many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.)