If the function f(x) is defined for all real numbers x as the maximum value of 4x + 4 and 12 + 3x, then for which one of the following values of x will f(x) actually equal 4x + 4 ?  Choices:
A) 4
B) 5
C) 6
D) 7
E) 9
Since f(x) defines maximum of 4x + 4 and 12 + 3x,   to find those x when 4x+4 has greater value,   4x + 4 &gt; 12 + 3x   or x &lt; 8   Only value that satisfy this is 7.   Answer is (7),
<result>D</result>
If the function f(x) is defined for all real numbers x as the maximum value of 4x + 4 and 12 + 3x, then for which one of the following values of x will f(x) actually equal 4x + 4 ?