book Maths Puzzle Numerical Ability

Find the inverse of the given function. f(x) = squareroot of (x-10).

Is there a solver for inverse functions?

Thanks

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book Other Question

Solve for t and find the digit that equals a: [3(230+t)]^2=492,a04 if points A,B,C on a coordinate line have cooridnates -5,3,and 10 respectively, find d(A,C) + d(B,C).