The high temperature Friday was 5 Degrees. The Low temperature was -7 degrees. What is the difference between the high and low temperatures?

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 you could answer these your a life saver

Can someone answer this question for me