Free points just bcuz im bored

Given abcd ac=38 and ae=3x+4 find the value of x

Find the solution of this system of equation -7x+y=-20 9x-3y=36

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