A) The sum of the ages of a father and his son is 42 years. Six years ago, the father 5 times as old as his son was. Find their present ages.
in algebra of equation in mathematic

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.