Determine the value(s) for which the function f(x) = (-9x+8)/(-12u+11) is undefined

Which rule describes the composition of transformations that maps ajkl to aj"k"l"? ro. 900 o to, -2(x, y) to, -20 ro, 900(x, y) ro, 9000 t-2. o(x,y) t-2, 00 ro, 900(x, y)

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In the equation sqrt(n+5)-sqrt(11-10)=1. what is the value of n