Enriques's collection has 64 fewer refigerator magnets in it than Peter's magnets together. How many many refigerator magnets does Pete have?

Can someone me out here and the tell me the greatest common factor

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

Which of the following is an equation of a line parallel to the equation y=4x+1?