If f(x)= -2[x+1] what is f(3.7)

Solve the system of equations y= 3/2 - 1, -x+ y =-3

For a function f(x), a) if f(7) = 22 then f^-1(22) = b) f^-1(f(c)) =

Will mark 50 show all what is the solution to the system of equations? use the substitution method and show your work. -5x+y= -3 -15 x+3y=7 explain what your answer in part (a) tells you about the association of the lines in this system.