Help lol i can’t do math and everything is due at midnight

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

If f(x) = 2x + 8 and g(x) = x4, what is (gº)?

Tan198=asin164=? how to solve this? ?