Ireally need its a test

if f -1(x) is the inverse of f(x), which statements must be true?
check all that apply.
a. f ^-1(f(x)) = x
b. f(f ^-1(x)) = x
c. the domain of f ^-1(x) is the domain of f(x).
d. the domain of f^ -1(x) is the range of f(x).
e. the range of f^ -1(x) is the domain of f(x).
f. the range of f^-1(x) is the range of f(x).

The means and mean absolute deviations of the individual times of members on two 4x400-meter relay track teams are shown in the table below. means and mean absolute deviations of individual times of members of 4x400-meter relay track teams team a team b mean 59.32 s 59.1 s mean absolute deviation 1.5 s 245 what percent of team b's mean absolute deviation is the difference in the means? 9% 15% 25% 65%

Which translation maps the vertex of the graph of the function f(x) = x2 onto the vertex of the function g(x) = x2 – 10x +2?

The graph of a quadratic function has a maximum at point (0, 5). the graph contains the point (2, 1). what is another point on the graph?