Determine the exact value of k so that the quadratic function f(x) = x2 - kx + 5 has only one zero.

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

If the altitude is drawn to the hypotenuse of a right triangle, then the two triangles formed are similar to the original triangle and to each other. which set of triangles shows the similar triangles created by the altitude in the diagram?

Which point has an coordinates of (2,0) ? a