Answer:
24 km or 10 km
Step-by-step explanation:
There are two ways I took this question to be.
First way:
The first way is adding all the distances. Like as Jesse walked to the west and then to east, I won't be using a "number line". For example, Jesse started at point 0 on a number line. Going west counts as going into the negative zone. Going east counts as going to into the positive zone; I won't be doing that.
So for the first way, we know that Jesse walked 7 km towards the west. If he walked twice as far towards the east, he walked 7 km * 2 = 14 km towards the east. So far, Jesse has walked 7 km + 14 km = 21 km.
Now, the explanation tells us that Jesse walked for another 3 km towards the east. 21 km + 3 km = 24 km.
24 km is the answer for the first way.
Second way:
The second way includes the "number line" I was talking about before.
Walking towards the west means walking into the negative zone of a number line, to the left. So, Jesse first walks 7 km. He is at -7 on a number line.
Then, he walks towards the east (right), which is walking towards the positive side on a number line. If he walks twice as far as 7 km, he walks 14 km. -7 km + 14 km= 7 km.
Now, we know that Jesse walked for another 3 km east. 3 km + 7 km = 10 km.
10 km is the answer for the second way.
I hope this helped! The first way makes a lot more sense to me, but I didn't want to miss out on anything or get the question wrong. Pick whatever makes more sense to you!
