Which number completes this equation:
2/7= 2 / ?
A.2. B.5 C.7 D.9

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

Find the domain of the following expression: 1/(√x)-2

Twelve less than a number is at most 20