Let the function f be defined by f(x) = x+1.
If 2f(p)=20, what is the value of f(3p)?
Frankly I will tell you anything I want because you came off as demanding that we work a problem for you. You could have easily explained your position and your son's problem. But you chose not to explain but demand. We are neither a homework service nor a tutorial service. You did not even atop to consider the help I did give you freely.
Solve $\displaystyle 2(p+1)=20$ then find $\displaystyle f(3p)$.
Let me be blunt with you. If your son cannot do that, then you are wasting money on the SAT.
I am retired chairman of a university mathematics department so I should know.
Tell what you want.
I have always replied in a thankful affirmative to any help I have received. (only 3 questions total I believe)
As a math department chairman, you should be aware that sometimes people spend so much time working the difficult problems the obvious gets by them.
My son is an exceptional student. I am glad you are retired so there is no chance he will end up with you as a professor.
You have chosen a poor name to represent yourself with.
Your counterparts on the forum have been very nice.
Perhaps you should learn from them.