A friend of mine needs help with the following two problems, but i can't exactly figure out what they want, so I figured you guys could help out.

14)

16)

Step-by-step explanation:

We have the two functions: and .

14)

We want to find x if .

In other words, we want to find for what value of x does f(x) equal 3.

So, to do so, we can substitute our equation, , for f(x) and solve for x. This gives us:

Solve for x. Add 3 to both sides:

Divide by 2:

So, , and our x is 3.

16)

We have:

This is known as composition of functions. This is equivalent to

So, let's find f(2) first. We know that:

Substitute 2 for x:

Evaluate:

Therefore, our composition of functions can be rewritten as:

Find g(1). We know that:

Substitute 1 for x:

Evaluate:

Therefore:

5x+10 is the correct one

hope this