Question

Evaluate when n=5 4n

Answer 1

We are given an expression "4n"

The question says to evaluate this expression when n = 5

Here, evaluation simply means, finding the value of "4n" when n = 5. This is a simple problem of substitution. By substitution I mean replacing every occurence of n in the given expression by 5. This would be done as follows:

Given expression = 4n

Note that here 4 is being multiplied to n.

Replacing n by 5, we get the result as:

`4\text{ }*\text{ 5 = 20 }`

From here, we can conclude that the value of expression "4n" for n = 5 will be 20.