Advanced Math practice question

Answer: 3

g(4) = √(4 + 5) = √9 = 3.

Common wrong answers

If you answered 7

7 is √4 + 5 = 2 + 5, taking the root of x alone; the root covers x + 5.

If you answered 9

9 is x + 5 without the square root.

If you answered 4.5

4.5 is (4 + 5)/2, halving instead of taking the square root.

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