Question

If f(x) = x + 5, what does f(8) represent?

The value of x when (x + 5) = 8
The value of 8f(x) when x = 8
The value of f(x) when (x + 5) = 8
The value of (x + 5) when x = 8

Answer 1

The value of (x+5) when x = 8

So,

f(x) = x + 5

f(8) = (8) + 5
f(8) = 13

Answer 2

f(8) represents the value of (x + 5) when x = 8 and the value of f(8) is 13 .

Explanation:

As given in the question be as follow

f(x) = x + 5

put x = 8 in the expression f(x) = x + 5 .

Thus the expression becomes

f(8) = 8 + 5

= 13

f(8) = 13

Therefore f(8) represented the value of (x + 5) when x = 8 and the value of f(8) is 13 .