Final answer:
The number line represents two arrows labeled 5 and -1, which indicate addition and subtraction respectively. The expression is 0 + 5 and 5 - 1, and the sum of these expressions is 9.
Step-by-step explanation:
The number line represents a range from -1 to 5, with two arrows labeled 5 and -1. The arrow labeled 5 starts at 0 and ends at 5, while the arrow labeled -1 starts at 5 and ends at 4.
To find an expression, we need to determine the operation between the numbers. Since the arrow labeled 5 starts at 0 and ends at 5, it represents addition. So, the expression would be 0 + 5. On the other hand, the arrow labeled -1 represents subtraction because it starts at 5 and ends at 4. The expression would be 5 - 1.
To find the sum, we simply evaluate the expressions. 0 + 5 equals 5, and 5 - 1 equals 4. So, the sum of the two expressions is 5 + 4 = 9. Therefore, the sum is 9.