Please helppp im soo close to being done (its easy i just forgot how to do it)

Need on this geometry question. explain how you did it.

Use the formulas a = x 2 – y 2, b = 2xy, c = x 2 + y 2 to answer this question. one leg of a right triangle has length 11 and all sides are whole numbers. find the lengths of the other two sides. the other leg = a0 and the hypotenuse = a1

Awasher and a dryer cost $701 combined. the washer costs $51 more than the dryer. what is the cost of the dryer?