Need with the composition of two rational functions. screenshot is below

We just have to write one function inside the other:

Since we have a fraction with x in the denominator, we have to remove from the domain the value of  that makes null the denominator. Thus,

Furthermore, we also have to remove the value of x that annuls the denominator of g(x), because that's the first function that we use. So:

Hence, the domain is:

the answer is 510

step-by-step explanation:

15 • 13 = 195

15 • 12 = 180

15 • 5 = 75

12 • 5 = 60

195 + 180 = 375

375 + 75 = 450

450 + 60 = 510

2222222222222222222

step-by-step explanation: