Function rule d(c(x))?

is this for math?


if so:


Take the function c(x) and put it in for every x in the function d(x).


So, if


c(x) = 2


and


d(x) = 3x^2 + 5x -1


the new equation would look like


d(c(x)) = 3(2)^2 + 5(2) -1


for a final answer of:


21

sweet pea