In right triangle ABC shown in the diagram, altitude BD is drawn to hypotenuse AC, D=12, and AD=3.
What is the length of AB?
(1) 53
(2) 6
(3) 3/5
(4) 9

The graph of the function f(x) = (x + 2)(x + 6) is shown below. which statement about the function is true? the function is positive for all real values of x where x > –4. the function is negative for all real values of x where –6 < x < –2. the function is positive for all real values of x where x < –6 or x > –3. the function is negative for all real values of x where x < –2.