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Show algebraically that f and g are inverse functions f(x)=x^2/-6; g(x)=square root of 2x+12

Is triangle jkl congruent to triangle rst? if so, what is the scale factor?

Which statements describe the solutions to the inequality x< -20 check all that apply. there are infinite solutions. each solution is negative. each solution is positive. the solutions are both positive and negative. the solutions contain only integer values. the solutions contain rational number values.