find the derivative with respect to x of f(x)=4x , and use it to find the equation of the tangent line to y=4x at x= 5

Which is the graph of the piecewise function f(x)? f(x)=[tex]f(x) = \left \{ {{-x+1, x\leq 0 } \atop {x+1, x\ \textgreater \ 0}} \right.[/tex]

Given that ot =5, xt=12, and ox= 13 is xy tangent to circle o at t? explain.

If f(x) and g(x) are inverse functions of each other, which of the following shows the graph of f(g(x)