Question

How do I do this function stuff I’m been kinda confused

Answer 1

Step-by-step explanation:

When solving a function, you plug in the given
`x`-value (what's inside the parentheses next to the
`g` or
`f`) into the corresponding equation (what
`f(x)` and
`g(x)` are set equal to).

Before starting the worksheet, take a simpler example:

Given the function
`h(x) = x + 2`,

the following work solves for
`h(3)`.

`h(3) = 3 + 2`

`h(3) = 5`

Essentially, to solve for the value of a function for a given
`x`-value, simply plug in that value in for
`x` and simplify the resulting expression.

Onto problem 14 from the given worksheet:

We are given
`f(x) = 3x + 2` and are asked to solve for
`f(4)`.

Hence, all we have to do is plug
`4` in for
`x`:

`f(4) = 3(4) + 2`

`f(4) = 12 + 2`

`f(4) = 14`

You can apply this concept to the rest of the problems.