Practice Test 5

$\small \small f (x) = 2x + \sqrt{x - 1}$

$\small g (x) = 6x - \sqrt{x-1}$

What is the domain of the function (f+g)(x) ?

$f(x) = \log \frac{1}{x+3}$

$g(x) = \log(4x+12)$

Give the y-coordinate of a point at which the graphs of the functions intersect.