Help ASAP The diagram shows a trapezium ABCD and a square PQRS.
AD=8cm
DC=3AB
The perimeter of the square is 24cm
The area of the square is half the area of the trapezium work out the length of AB

Mozart lenses inc. recently introduced seelites, a thinner lens for eyelasses. of a sample of 800 eyeglass wearers, 246 said they would purchases their next pair of eyeglasses with the new lenses. lenses inc. estimates that the number of people who purchase eyeglasses in a year is 1,700,000. most eyeglasses wearer buy one new pair of eyeglasses a year. what is the annual sales potential for the new lenses.

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

The fence around a quadrilateral-shaped pasture is 3a^2+15a+9 long. three sides of the fence have the following lengths: 5a, 10a-2, a^2-7. what is the length of the fourth side of the fence?