Completing the square

x^{2}+3×=0

Find the solution of this system of equation -7x+y=-20 9x-3y=36

Type the correct answer in each box. use numerals instead of words. if necessary, use / fir the fraction bar(s). the graph represents the piecewise function: h

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