What's the answer to 5/8 - 3/4 (8- 1/3) + 1

Which of the following answers is 7/9 simplified? 7/9 2/9 11/9 2/7

How much dextrose 70% must be mixed with dextrose 5% to prepare 1,000 ml of dextrose 20%?

The area of a rectangle is 10 cm^2. one side of the rectangle is x cm. express the perimeter of the rectangle in terms of x and show that this rectangle cannot have a perimeter of 12 cm. the perimeter of the rectangle in terms of x is __ cm