Answer
13
Work Step by Step
Go to 9 on the number line.
Since we are adding 4, simply move 4 spaces to the right.
We end up at 13.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.