Pls me! i’m very confused on this certain question.

If the measure of xyz is 81 what is the measure of yz

How many square feet of out door carpet will we need for this hole? 8ft 3ft 12ft 4ft

Adepartment store purchases screen-printed t-shirts at a cost of $5 per shirt. they mark up the price 150% (making the selling price 250% of the store's purchase price) and put them on the sales floor. every month that a t-shirt doesn't sell, the store reduces the selling price by 25%.