Which number line correctly represents −7+8?

The number line that correctly represents -7+8 is a number line that starts at -7 and moves to the right by 8 units, ending at +1.

add (−3) and (−17)

To add -3 and -17, you would sum the values together: -3 + -17 = -20.

To represent the expression −7 + 8 on a number line, follow these steps:

Step 1: Locate the starting point
Start by finding the point that represents -7 on the number line.

Step 2: Move 8 units to the right
From the starting point, move 8 units to the right, representing the addition of 8.

Step 3: Locate the endpoint
The endpoint represents the final value of the expression.

Based on these steps, the number line that correctly represents −7+8 would show the starting point at -7 and the endpoint at +1, with a movement of 8 units to the right.