Question

N(p) = 60p - p^2

What is the value of N(9)?

Answer 1

plug in the value of p=9

Answer 2

Simple functions generally have the noation:
F(x) = {numbers and the variable x}
To solve, simply plug the number into the equation, replacing the co-efficient with the number.

For example, if N(p) = 60p - p^2 then to evaluate N(9) simple replace all the instances of 'p' within the function with '9' and evaluate it. So N(9) = 60(9) - (9)^2 = ...