Posted by evan on Thursday, August 6, 2009 at 5:37pm.
the function f(d) = 2d + 5 represents the number of song downloads a person can get for d dollars. What is f(4)

math  Marth, Thursday, August 6, 2009 at 5:43pm
f(d) = 2d + 5
To find f(4), substitute 4 for d in the above equation.
f(4) = 2*4 + 5
f(4) = 13