If the average (arithmetic mean) of (2a+16) and (3a-8) is 84, what is the value of a?	Pick one
A) 25 B) 30 C) 28 D) 32 E) 42
((2a+16) + (3a-8)) / 2 = (5a+8)/2 = 84   a= 32   The answer is 32.
<result>D</result>
If the average (arithmetic mean) of (2a+16) and (3a-8) is 84, what is the value of a?