Question

If f(x) = 5x-7 what is f(3)?

Answer 1

You would substitute 3 in place of the x. Example: 5(3)-7=8

Answer 2

`f(3)=8`

Explanation:

Given: The function
`f(x)=5x-7`

To find: The value of the given function at x=3

Solution:

The given function is:

`f(x)=5x-7`

Now, substituting the value of x in the above given function, we get

`f(3)=5(3)-7`

Upon solving the above equation, we get

`f(3)=15-7`

`f(3)=8`

Therefore, the value of the given function at x=3 is 8.