Find the Value of X (I will give brainlist)

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)

Given that abcd is a rhombus, what is the value of x?

The equation represents the function f, and the graph represents the function g. f(x)=3(5/2)^x determine the relationship between the growth factors of f and g. a. the growth factor of g is twice the growth factor of f. b. the growth factor of f is twice the growth factor of g. c. the growth factor of f is 2.5 times the growth factor of g. d. the growth factor of f is the same as the growth factor of g.