How can the solution of the inequality \(2\le x+5<9\) be written in interval form?

Correct answer: [-3,4)

Subtracting 5 from all three parts gives \(2-5\le x+5-5<9-5\), so \(-3\le x<4\). Thus, -3 is included and is shown with a square bracket, while 4 is excluded and is shown with a round bracket. Therefore, the correct interval is \([-3,4)\). The options \((-3,4]\), \((-3,4)\), and \([-3,4]\) use incorrect endpoint inclusion. Exam tip: \(\le\) or \(\ge\) gives a closed endpoint, whereas \(<\) or \(>\) gives an open endpoint.