Plzz help
I don't know how to solve this question so can you help me. ​

For which pair of functions is (gof)(a)=|a|-2?

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

Factor the expression using the gcf. the expression 21m−49n factored using the gcf