Ineed i dont remember how to do it

Pat listed all the numbers that have 15 as a multiple write the numbers in pats list

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

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