(20*6)+(12*6)+(18*10)=312 500-312=188 colored pencil's left.
The answer to this is negative
If p(x) is a function, then a real-world example might be
The amount of fish food, in grams required for the giant koi fish in the pond can be represented by the function
. If there are 50 fish, how many grams of fish food will you need?