Explain how you can use a number line to find the sum of 4+(-8)

-4

Explanation: To add 4 + (-8), we start at 0 on the number line.

4 tells us to move 4 units to the left.

From there, -8 tells us to move 8 units back to the left and you can see from the picture below that we end up at -4.

So 4 + (-8) is -4.

Image is provided below.

2 over 5

step-by-step explanation:

the 2: 3 ratio is the length of the ac segment to the cb segment total length. this implies that the ratio between segment ac length and segment ab length is 2: 5. point c is 2/5 from a to b, so the required fraction is 2/5.